/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/queue-add-3-nl.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-9bbddad6b14272d9691b7fb6f1c011d15ab18596-9bbddad [2021-06-12 22:19:48,507 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-12 22:19:48,509 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-12 22:19:48,533 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-12 22:19:48,595 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-06-12 22:19:48,616 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-12 22:19:48,616 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-12 22:19:48,616 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-12 22:19:48,616 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-12 22:19:48,617 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-12 22:19:48,617 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-12 22:19:48,618 INFO L138 SettingsManager]: * Use SBE=true [2021-06-12 22:19:48,618 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-12 22:19:48,618 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-12 22:19:48,618 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-12 22:19:48,618 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-12 22:19:48,618 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-12 22:19:48,619 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-12 22:19:48,619 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-12 22:19:48,619 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-12 22:19:48,619 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-12 22:19:48,619 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-12 22:19:48,619 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-12 22:19:48,619 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-12 22:19:48,619 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-12 22:19:48,620 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-12 22:19:48,620 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-12 22:19:48,620 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-12 22:19:48,620 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-12 22:19:48,620 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-12 22:19:48,620 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-12 22:19:48,621 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-12 22:19:48,621 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-12 22:19:48,621 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-12 22:19:48,621 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-12 22:19:48,621 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-12 22:19:48,621 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-12 22:19:48,887 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-12 22:19:48,906 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-12 22:19:48,908 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-12 22:19:48,909 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-12 22:19:48,911 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-12 22:19:48,912 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/queue-add-3-nl.wvr.bpl [2021-06-12 22:19:48,912 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/queue-add-3-nl.wvr.bpl' [2021-06-12 22:19:48,942 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-12 22:19:48,944 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-12 22:19:48,945 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-12 22:19:48,945 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-12 22:19:48,945 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-12 22:19:48,954 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "queue-add-3-nl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 10:19:48" (1/1) ... [2021-06-12 22:19:48,960 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "queue-add-3-nl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 10:19:48" (1/1) ... [2021-06-12 22:19:48,966 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-12 22:19:48,967 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-12 22:19:48,967 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-12 22:19:48,968 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-12 22:19:48,973 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "queue-add-3-nl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 10:19:48" (1/1) ... [2021-06-12 22:19:48,974 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "queue-add-3-nl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 10:19:48" (1/1) ... [2021-06-12 22:19:48,975 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "queue-add-3-nl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 10:19:48" (1/1) ... [2021-06-12 22:19:48,975 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "queue-add-3-nl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 10:19:48" (1/1) ... [2021-06-12 22:19:48,977 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "queue-add-3-nl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 10:19:48" (1/1) ... [2021-06-12 22:19:48,979 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "queue-add-3-nl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 10:19:48" (1/1) ... [2021-06-12 22:19:48,980 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "queue-add-3-nl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 10:19:48" (1/1) ... [2021-06-12 22:19:48,981 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-12 22:19:48,982 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-12 22:19:48,982 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-12 22:19:48,982 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-12 22:19:48,983 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "queue-add-3-nl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 10:19:48" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-12 22:19:49,041 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-12 22:19:49,042 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-12 22:19:49,042 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-12 22:19:49,042 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-12 22:19:49,042 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-12 22:19:49,042 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-12 22:19:49,042 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-12 22:19:49,043 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-12 22:19:49,043 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-12 22:19:49,043 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-06-12 22:19:49,043 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-06-12 22:19:49,043 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-06-12 22:19:49,044 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-12 22:19:49,237 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-12 22:19:49,237 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-06-12 22:19:49,239 INFO L202 PluginConnector]: Adding new model queue-add-3-nl.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.06 10:19:49 BoogieIcfgContainer [2021-06-12 22:19:49,239 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-12 22:19:49,240 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-12 22:19:49,240 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-12 22:19:49,243 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-12 22:19:49,243 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "queue-add-3-nl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 10:19:48" (1/2) ... [2021-06-12 22:19:49,244 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75f041b8 and model type queue-add-3-nl.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.06 10:19:49, skipping insertion in model container [2021-06-12 22:19:49,244 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "queue-add-3-nl.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.06 10:19:49" (2/2) ... [2021-06-12 22:19:49,245 INFO L111 eAbstractionObserver]: Analyzing ICFG queue-add-3-nl.wvr.bpl [2021-06-12 22:19:49,249 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-12 22:19:49,249 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-12 22:19:49,250 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-12 22:19:49,250 INFO L471 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-12 22:19:49,283 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-06-12 22:19:49,299 INFO L255 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-06-12 22:19:49,314 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-12 22:19:49,314 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-12 22:19:49,314 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-12 22:19:49,315 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-12 22:19:49,315 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-12 22:19:49,315 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-12 22:19:49,315 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-12 22:19:49,315 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-06-12 22:19:49,324 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 49 places, 42 transitions, 108 flow [2021-06-12 22:19:49,478 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 1015 states, 1013 states have (on average 2.974333662388944) internal successors, (3013), 1014 states have internal predecessors, (3013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:19:49,482 INFO L276 IsEmpty]: Start isEmpty. Operand has 1015 states, 1013 states have (on average 2.974333662388944) internal successors, (3013), 1014 states have internal predecessors, (3013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:19:49,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 22:19:49,505 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:19:49,506 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:19:49,506 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:19:49,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:19:49,515 INFO L82 PathProgramCache]: Analyzing trace with hash 1929067150, now seen corresponding path program 1 times [2021-06-12 22:19:49,523 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:19:49,523 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708877634] [2021-06-12 22:19:49,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:19:49,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:19:49,666 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:19:49,667 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:19:49,667 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708877634] [2021-06-12 22:19:49,668 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1708877634] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 22:19:49,668 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 22:19:49,669 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-12 22:19:49,670 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265734074] [2021-06-12 22:19:49,674 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-12 22:19:49,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:19:49,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-12 22:19:49,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-12 22:19:49,694 INFO L87 Difference]: Start difference. First operand has 1015 states, 1013 states have (on average 2.974333662388944) internal successors, (3013), 1014 states have internal predecessors, (3013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:19:49,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:19:49,752 INFO L93 Difference]: Finished difference Result 1112 states and 3308 transitions. [2021-06-12 22:19:49,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-12 22:19:49,754 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 22:19:49,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:19:49,779 INFO L225 Difference]: With dead ends: 1112 [2021-06-12 22:19:49,779 INFO L226 Difference]: Without dead ends: 1112 [2021-06-12 22:19:49,781 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-12 22:19:49,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1112 states. [2021-06-12 22:19:49,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1112 to 1112. [2021-06-12 22:19:49,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1112 states, 1111 states have (on average 2.9774977497749773) internal successors, (3308), 1111 states have internal predecessors, (3308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:19:49,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1112 states to 1112 states and 3308 transitions. [2021-06-12 22:19:49,893 INFO L78 Accepts]: Start accepts. Automaton has 1112 states and 3308 transitions. Word has length 22 [2021-06-12 22:19:49,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:19:49,894 INFO L482 AbstractCegarLoop]: Abstraction has 1112 states and 3308 transitions. [2021-06-12 22:19:49,894 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:19:49,894 INFO L276 IsEmpty]: Start isEmpty. Operand 1112 states and 3308 transitions. [2021-06-12 22:19:49,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:19:49,899 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:19:49,899 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:19:49,899 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-12 22:19:49,900 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:19:49,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:19:49,903 INFO L82 PathProgramCache]: Analyzing trace with hash 1762895786, now seen corresponding path program 1 times [2021-06-12 22:19:49,904 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:19:49,905 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055367698] [2021-06-12 22:19:49,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:19:49,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:19:49,972 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:19:49,972 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:19:49,972 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055367698] [2021-06-12 22:19:49,973 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2055367698] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 22:19:49,973 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 22:19:49,973 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-12 22:19:49,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809987734] [2021-06-12 22:19:49,974 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-12 22:19:49,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:19:49,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-12 22:19:49,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-12 22:19:49,975 INFO L87 Difference]: Start difference. First operand 1112 states and 3308 transitions. Second operand has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 2 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:19:50,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:19:50,006 INFO L93 Difference]: Finished difference Result 1165 states and 3465 transitions. [2021-06-12 22:19:50,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-12 22:19:50,007 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 2 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:19:50,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:19:50,013 INFO L225 Difference]: With dead ends: 1165 [2021-06-12 22:19:50,013 INFO L226 Difference]: Without dead ends: 1165 [2021-06-12 22:19:50,015 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-12 22:19:50,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1165 states. [2021-06-12 22:19:50,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1165 to 1165. [2021-06-12 22:19:50,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1165 states, 1164 states have (on average 2.9768041237113403) internal successors, (3465), 1164 states have internal predecessors, (3465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:19:50,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1165 states to 1165 states and 3465 transitions. [2021-06-12 22:19:50,054 INFO L78 Accepts]: Start accepts. Automaton has 1165 states and 3465 transitions. Word has length 28 [2021-06-12 22:19:50,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:19:50,054 INFO L482 AbstractCegarLoop]: Abstraction has 1165 states and 3465 transitions. [2021-06-12 22:19:50,054 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 2 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:19:50,054 INFO L276 IsEmpty]: Start isEmpty. Operand 1165 states and 3465 transitions. [2021-06-12 22:19:50,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:19:50,059 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:19:50,060 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:19:50,060 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-12 22:19:50,060 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:19:50,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:19:50,061 INFO L82 PathProgramCache]: Analyzing trace with hash 1379187016, now seen corresponding path program 2 times [2021-06-12 22:19:50,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:19:50,061 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642608445] [2021-06-12 22:19:50,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:19:50,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:19:50,120 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:19:50,120 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:19:50,121 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642608445] [2021-06-12 22:19:50,121 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [642608445] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 22:19:50,121 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 22:19:50,121 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-12 22:19:50,121 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301789679] [2021-06-12 22:19:50,122 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-12 22:19:50,122 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:19:50,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-12 22:19:50,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-12 22:19:50,123 INFO L87 Difference]: Start difference. First operand 1165 states and 3465 transitions. Second operand has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:19:50,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:19:50,139 INFO L93 Difference]: Finished difference Result 1281 states and 3812 transitions. [2021-06-12 22:19:50,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-12 22:19:50,140 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:19:50,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:19:50,146 INFO L225 Difference]: With dead ends: 1281 [2021-06-12 22:19:50,146 INFO L226 Difference]: Without dead ends: 1281 [2021-06-12 22:19:50,147 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-12 22:19:50,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1281 states. [2021-06-12 22:19:50,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1281 to 1281. [2021-06-12 22:19:50,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1281 states, 1280 states have (on average 2.978125) internal successors, (3812), 1280 states have internal predecessors, (3812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:19:50,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1281 states to 1281 states and 3812 transitions. [2021-06-12 22:19:50,179 INFO L78 Accepts]: Start accepts. Automaton has 1281 states and 3812 transitions. Word has length 28 [2021-06-12 22:19:50,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:19:50,180 INFO L482 AbstractCegarLoop]: Abstraction has 1281 states and 3812 transitions. [2021-06-12 22:19:50,180 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:19:50,184 INFO L276 IsEmpty]: Start isEmpty. Operand 1281 states and 3812 transitions. [2021-06-12 22:19:50,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 22:19:50,188 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:19:50,188 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:19:50,188 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-12 22:19:50,188 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:19:50,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:19:50,189 INFO L82 PathProgramCache]: Analyzing trace with hash -2128701786, now seen corresponding path program 1 times [2021-06-12 22:19:50,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:19:50,189 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890047698] [2021-06-12 22:19:50,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:19:50,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:19:50,507 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:19:50,507 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:19:50,507 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890047698] [2021-06-12 22:19:50,507 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890047698] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:19:50,508 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [185101322] [2021-06-12 22:19:50,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:19:50,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:19:50,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 22:19:50,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:19:51,069 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:19:51,070 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [185101322] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:19:51,070 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:19:51,070 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-12 22:19:51,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597992605] [2021-06-12 22:19:51,071 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 22:19:51,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:19:51,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 22:19:51,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-06-12 22:19:51,074 INFO L87 Difference]: Start difference. First operand 1281 states and 3812 transitions. Second operand has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 16 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:19:51,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:19:51,795 INFO L93 Difference]: Finished difference Result 2269 states and 6580 transitions. [2021-06-12 22:19:51,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 22:19:51,795 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 16 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 22:19:51,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:19:51,806 INFO L225 Difference]: With dead ends: 2269 [2021-06-12 22:19:51,806 INFO L226 Difference]: Without dead ends: 2254 [2021-06-12 22:19:51,807 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 739.6ms TimeCoverageRelationStatistics Valid=130, Invalid=572, Unknown=0, NotChecked=0, Total=702 [2021-06-12 22:19:51,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2254 states. [2021-06-12 22:19:51,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2254 to 1446. [2021-06-12 22:19:51,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1446 states, 1445 states have (on average 2.9577854671280277) internal successors, (4274), 1445 states have internal predecessors, (4274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:19:51,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1446 states to 1446 states and 4274 transitions. [2021-06-12 22:19:51,847 INFO L78 Accepts]: Start accepts. Automaton has 1446 states and 4274 transitions. Word has length 33 [2021-06-12 22:19:51,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:19:51,848 INFO L482 AbstractCegarLoop]: Abstraction has 1446 states and 4274 transitions. [2021-06-12 22:19:51,848 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 16 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:19:51,848 INFO L276 IsEmpty]: Start isEmpty. Operand 1446 states and 4274 transitions. [2021-06-12 22:19:51,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 22:19:51,851 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:19:51,851 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:19:52,072 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:19:52,073 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:19:52,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:19:52,073 INFO L82 PathProgramCache]: Analyzing trace with hash -2021251418, now seen corresponding path program 2 times [2021-06-12 22:19:52,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:19:52,074 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557642363] [2021-06-12 22:19:52,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:19:52,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:19:52,370 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:19:52,371 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:19:52,371 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557642363] [2021-06-12 22:19:52,371 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557642363] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:19:52,371 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [660778690] [2021-06-12 22:19:52,371 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:19:52,411 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:19:52,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:19:52,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 22:19:52,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:19:52,641 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-12 22:19:52,643 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:19:52,651 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:19:52,652 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:19:52,652 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:21 [2021-06-12 22:19:52,834 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:19:52,834 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [660778690] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:19:52,834 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:19:52,834 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-06-12 22:19:52,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658087449] [2021-06-12 22:19:52,835 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 22:19:52,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:19:52,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 22:19:52,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2021-06-12 22:19:52,836 INFO L87 Difference]: Start difference. First operand 1446 states and 4274 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:19:53,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:19:53,937 INFO L93 Difference]: Finished difference Result 2068 states and 5919 transitions. [2021-06-12 22:19:53,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-12 22:19:53,937 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 22:19:53,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:19:53,957 INFO L225 Difference]: With dead ends: 2068 [2021-06-12 22:19:53,957 INFO L226 Difference]: Without dead ends: 2053 [2021-06-12 22:19:53,959 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 1009.6ms TimeCoverageRelationStatistics Valid=200, Invalid=990, Unknown=0, NotChecked=0, Total=1190 [2021-06-12 22:19:53,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2053 states. [2021-06-12 22:19:54,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2053 to 1458. [2021-06-12 22:19:54,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1458 states, 1457 states have (on average 2.960878517501716) internal successors, (4314), 1457 states have internal predecessors, (4314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:19:54,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1458 states to 1458 states and 4314 transitions. [2021-06-12 22:19:54,016 INFO L78 Accepts]: Start accepts. Automaton has 1458 states and 4314 transitions. Word has length 33 [2021-06-12 22:19:54,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:19:54,016 INFO L482 AbstractCegarLoop]: Abstraction has 1458 states and 4314 transitions. [2021-06-12 22:19:54,016 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:19:54,016 INFO L276 IsEmpty]: Start isEmpty. Operand 1458 states and 4314 transitions. [2021-06-12 22:19:54,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 22:19:54,022 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:19:54,022 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:19:54,236 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:19:54,237 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:19:54,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:19:54,237 INFO L82 PathProgramCache]: Analyzing trace with hash 1397533414, now seen corresponding path program 3 times [2021-06-12 22:19:54,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:19:54,238 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136470180] [2021-06-12 22:19:54,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:19:54,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:19:54,489 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:19:54,489 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:19:54,490 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136470180] [2021-06-12 22:19:54,490 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136470180] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:19:54,490 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [181604642] [2021-06-12 22:19:54,491 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:19:54,530 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 22:19:54,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:19:54,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 22:19:54,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:19:54,682 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-12 22:19:54,683 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:19:54,692 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:19:54,693 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:19:54,693 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:21 [2021-06-12 22:19:54,872 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:19:54,872 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [181604642] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:19:54,872 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:19:54,873 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-06-12 22:19:54,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130953309] [2021-06-12 22:19:54,873 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 22:19:54,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:19:54,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 22:19:54,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2021-06-12 22:19:54,874 INFO L87 Difference]: Start difference. First operand 1458 states and 4314 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:19:55,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:19:55,629 INFO L93 Difference]: Finished difference Result 2308 states and 6666 transitions. [2021-06-12 22:19:55,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 22:19:55,629 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 22:19:55,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:19:55,639 INFO L225 Difference]: With dead ends: 2308 [2021-06-12 22:19:55,639 INFO L226 Difference]: Without dead ends: 2289 [2021-06-12 22:19:55,640 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 697.4ms TimeCoverageRelationStatistics Valid=158, Invalid=772, Unknown=0, NotChecked=0, Total=930 [2021-06-12 22:19:55,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2289 states. [2021-06-12 22:19:55,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2289 to 1458. [2021-06-12 22:19:55,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1458 states, 1457 states have (on average 2.959505833905285) internal successors, (4312), 1457 states have internal predecessors, (4312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:19:55,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1458 states to 1458 states and 4312 transitions. [2021-06-12 22:19:55,677 INFO L78 Accepts]: Start accepts. Automaton has 1458 states and 4312 transitions. Word has length 33 [2021-06-12 22:19:55,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:19:55,677 INFO L482 AbstractCegarLoop]: Abstraction has 1458 states and 4312 transitions. [2021-06-12 22:19:55,678 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:19:55,678 INFO L276 IsEmpty]: Start isEmpty. Operand 1458 states and 4312 transitions. [2021-06-12 22:19:55,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 22:19:55,681 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:19:55,681 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:19:55,892 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:19:55,893 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:19:55,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:19:55,893 INFO L82 PathProgramCache]: Analyzing trace with hash 1539248554, now seen corresponding path program 4 times [2021-06-12 22:19:55,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:19:55,894 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020759080] [2021-06-12 22:19:55,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:19:55,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:19:56,099 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:19:56,099 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:19:56,099 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020759080] [2021-06-12 22:19:56,099 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020759080] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:19:56,100 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [934358482] [2021-06-12 22:19:56,100 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:19:56,155 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:19:56,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:19:56,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 22:19:56,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:19:56,415 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:19:56,415 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [934358482] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:19:56,415 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:19:56,415 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-12 22:19:56,416 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175864724] [2021-06-12 22:19:56,416 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 22:19:56,416 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:19:56,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 22:19:56,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-06-12 22:19:56,417 INFO L87 Difference]: Start difference. First operand 1458 states and 4312 transitions. Second operand has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 16 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:19:57,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:19:57,219 INFO L93 Difference]: Finished difference Result 2568 states and 7386 transitions. [2021-06-12 22:19:57,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-12 22:19:57,220 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 16 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 22:19:57,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:19:57,231 INFO L225 Difference]: With dead ends: 2568 [2021-06-12 22:19:57,232 INFO L226 Difference]: Without dead ends: 2553 [2021-06-12 22:19:57,232 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 745.7ms TimeCoverageRelationStatistics Valid=164, Invalid=766, Unknown=0, NotChecked=0, Total=930 [2021-06-12 22:19:57,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2553 states. [2021-06-12 22:19:57,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2553 to 1477. [2021-06-12 22:19:57,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1477 states, 1476 states have (on average 2.959349593495935) internal successors, (4368), 1476 states have internal predecessors, (4368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:19:57,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1477 states to 1477 states and 4368 transitions. [2021-06-12 22:19:57,276 INFO L78 Accepts]: Start accepts. Automaton has 1477 states and 4368 transitions. Word has length 33 [2021-06-12 22:19:57,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:19:57,276 INFO L482 AbstractCegarLoop]: Abstraction has 1477 states and 4368 transitions. [2021-06-12 22:19:57,276 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 16 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:19:57,276 INFO L276 IsEmpty]: Start isEmpty. Operand 1477 states and 4368 transitions. [2021-06-12 22:19:57,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 22:19:57,279 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:19:57,280 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:19:57,502 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:19:57,502 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:19:57,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:19:57,502 INFO L82 PathProgramCache]: Analyzing trace with hash 256101094, now seen corresponding path program 5 times [2021-06-12 22:19:57,503 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:19:57,503 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889244265] [2021-06-12 22:19:57,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:19:57,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:19:57,729 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:19:57,729 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:19:57,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889244265] [2021-06-12 22:19:57,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1889244265] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:19:57,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1239722523] [2021-06-12 22:19:57,729 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:19:57,768 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:19:57,768 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:19:57,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 22:19:57,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:19:57,986 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:19:57,986 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1239722523] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:19:57,986 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:19:57,986 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-12 22:19:57,986 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284597419] [2021-06-12 22:19:57,987 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 22:19:57,987 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:19:57,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 22:19:57,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-06-12 22:19:57,988 INFO L87 Difference]: Start difference. First operand 1477 states and 4368 transitions. Second operand has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 16 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:19:58,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:19:58,654 INFO L93 Difference]: Finished difference Result 2510 states and 7227 transitions. [2021-06-12 22:19:58,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-12 22:19:58,654 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 16 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 22:19:58,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:19:58,664 INFO L225 Difference]: With dead ends: 2510 [2021-06-12 22:19:58,664 INFO L226 Difference]: Without dead ends: 2495 [2021-06-12 22:19:58,664 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 662.7ms TimeCoverageRelationStatistics Valid=140, Invalid=672, Unknown=0, NotChecked=0, Total=812 [2021-06-12 22:19:58,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2495 states. [2021-06-12 22:19:58,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2495 to 1477. [2021-06-12 22:19:58,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1477 states, 1476 states have (on average 2.959349593495935) internal successors, (4368), 1476 states have internal predecessors, (4368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:19:58,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1477 states to 1477 states and 4368 transitions. [2021-06-12 22:19:58,703 INFO L78 Accepts]: Start accepts. Automaton has 1477 states and 4368 transitions. Word has length 33 [2021-06-12 22:19:58,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:19:58,704 INFO L482 AbstractCegarLoop]: Abstraction has 1477 states and 4368 transitions. [2021-06-12 22:19:58,704 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 16 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:19:58,704 INFO L276 IsEmpty]: Start isEmpty. Operand 1477 states and 4368 transitions. [2021-06-12 22:19:58,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 22:19:58,707 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:19:58,707 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:19:58,929 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:19:58,929 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:19:58,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:19:58,929 INFO L82 PathProgramCache]: Analyzing trace with hash 477980326, now seen corresponding path program 6 times [2021-06-12 22:19:58,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:19:58,929 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103037963] [2021-06-12 22:19:58,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:19:58,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:19:59,114 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:19:59,114 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:19:59,114 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103037963] [2021-06-12 22:19:59,114 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1103037963] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:19:59,114 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [633097565] [2021-06-12 22:19:59,114 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:19:59,148 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-12 22:19:59,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:19:59,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 22:19:59,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:19:59,440 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:19:59,440 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [633097565] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:19:59,440 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:19:59,440 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-06-12 22:19:59,440 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653264412] [2021-06-12 22:19:59,440 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 22:19:59,441 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:19:59,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 22:19:59,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-06-12 22:19:59,441 INFO L87 Difference]: Start difference. First operand 1477 states and 4368 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:19:59,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:19:59,977 INFO L93 Difference]: Finished difference Result 2484 states and 7184 transitions. [2021-06-12 22:19:59,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 22:19:59,978 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 22:19:59,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:19:59,994 INFO L225 Difference]: With dead ends: 2484 [2021-06-12 22:19:59,994 INFO L226 Difference]: Without dead ends: 2469 [2021-06-12 22:19:59,995 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 530.5ms TimeCoverageRelationStatistics Valid=166, Invalid=764, Unknown=0, NotChecked=0, Total=930 [2021-06-12 22:19:59,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2469 states. [2021-06-12 22:20:00,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2469 to 1561. [2021-06-12 22:20:00,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1561 states, 1560 states have (on average 2.943589743589744) internal successors, (4592), 1560 states have internal predecessors, (4592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:20:00,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1561 states to 1561 states and 4592 transitions. [2021-06-12 22:20:00,032 INFO L78 Accepts]: Start accepts. Automaton has 1561 states and 4592 transitions. Word has length 33 [2021-06-12 22:20:00,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:20:00,032 INFO L482 AbstractCegarLoop]: Abstraction has 1561 states and 4592 transitions. [2021-06-12 22:20:00,032 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:20:00,032 INFO L276 IsEmpty]: Start isEmpty. Operand 1561 states and 4592 transitions. [2021-06-12 22:20:00,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 22:20:00,036 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:20:00,036 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:20:00,248 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:20:00,249 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:20:00,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:20:00,249 INFO L82 PathProgramCache]: Analyzing trace with hash 504049202, now seen corresponding path program 7 times [2021-06-12 22:20:00,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:20:00,249 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045278581] [2021-06-12 22:20:00,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:20:00,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:20:00,442 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:20:00,443 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:20:00,443 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045278581] [2021-06-12 22:20:00,443 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2045278581] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:20:00,443 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1683102963] [2021-06-12 22:20:00,443 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:20:00,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:20:00,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 22:20:00,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:20:00,769 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:20:00,769 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1683102963] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:20:00,769 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:20:00,769 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-12 22:20:00,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117434015] [2021-06-12 22:20:00,770 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 22:20:00,770 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:20:00,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 22:20:00,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-06-12 22:20:00,771 INFO L87 Difference]: Start difference. First operand 1561 states and 4592 transitions. Second operand has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 16 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:20:01,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:20:01,765 INFO L93 Difference]: Finished difference Result 2207 states and 6308 transitions. [2021-06-12 22:20:01,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-12 22:20:01,765 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 16 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 22:20:01,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:20:01,769 INFO L225 Difference]: With dead ends: 2207 [2021-06-12 22:20:01,770 INFO L226 Difference]: Without dead ends: 2192 [2021-06-12 22:20:01,770 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 911.2ms TimeCoverageRelationStatistics Valid=163, Invalid=767, Unknown=0, NotChecked=0, Total=930 [2021-06-12 22:20:01,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2192 states. [2021-06-12 22:20:01,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2192 to 1624. [2021-06-12 22:20:01,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1624 states, 1623 states have (on average 2.9457794208256316) internal successors, (4781), 1623 states have internal predecessors, (4781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:20:01,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1624 states to 1624 states and 4781 transitions. [2021-06-12 22:20:01,808 INFO L78 Accepts]: Start accepts. Automaton has 1624 states and 4781 transitions. Word has length 33 [2021-06-12 22:20:01,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:20:01,808 INFO L482 AbstractCegarLoop]: Abstraction has 1624 states and 4781 transitions. [2021-06-12 22:20:01,808 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 16 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:20:01,808 INFO L276 IsEmpty]: Start isEmpty. Operand 1624 states and 4781 transitions. [2021-06-12 22:20:01,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 22:20:01,812 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:20:01,812 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:20:02,028 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-06-12 22:20:02,029 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:20:02,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:20:02,029 INFO L82 PathProgramCache]: Analyzing trace with hash 275290358, now seen corresponding path program 8 times [2021-06-12 22:20:02,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:20:02,029 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721512652] [2021-06-12 22:20:02,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:20:02,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:20:02,234 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:20:02,234 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:20:02,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721512652] [2021-06-12 22:20:02,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [721512652] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:20:02,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1001236843] [2021-06-12 22:20:02,234 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:20:02,267 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:20:02,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:20:02,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 22:20:02,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:20:02,444 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-12 22:20:02,446 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:20:02,454 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:20:02,455 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:20:02,455 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:21 [2021-06-12 22:20:02,621 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:20:02,621 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1001236843] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:20:02,622 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:20:02,622 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-06-12 22:20:02,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107286903] [2021-06-12 22:20:02,623 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 22:20:02,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:20:02,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 22:20:02,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2021-06-12 22:20:02,624 INFO L87 Difference]: Start difference. First operand 1624 states and 4781 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:20:03,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:20:03,271 INFO L93 Difference]: Finished difference Result 2484 states and 7152 transitions. [2021-06-12 22:20:03,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 22:20:03,271 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 22:20:03,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:20:03,275 INFO L225 Difference]: With dead ends: 2484 [2021-06-12 22:20:03,275 INFO L226 Difference]: Without dead ends: 2469 [2021-06-12 22:20:03,276 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 691.7ms TimeCoverageRelationStatistics Valid=158, Invalid=772, Unknown=0, NotChecked=0, Total=930 [2021-06-12 22:20:03,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2469 states. [2021-06-12 22:20:03,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2469 to 1666. [2021-06-12 22:20:03,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1666 states, 1665 states have (on average 2.926126126126126) internal successors, (4872), 1665 states have internal predecessors, (4872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:20:03,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1666 states to 1666 states and 4872 transitions. [2021-06-12 22:20:03,313 INFO L78 Accepts]: Start accepts. Automaton has 1666 states and 4872 transitions. Word has length 33 [2021-06-12 22:20:03,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:20:03,314 INFO L482 AbstractCegarLoop]: Abstraction has 1666 states and 4872 transitions. [2021-06-12 22:20:03,314 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:20:03,314 INFO L276 IsEmpty]: Start isEmpty. Operand 1666 states and 4872 transitions. [2021-06-12 22:20:03,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 22:20:03,317 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:20:03,318 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:20:03,532 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-06-12 22:20:03,533 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:20:03,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:20:03,533 INFO L82 PathProgramCache]: Analyzing trace with hash -671441442, now seen corresponding path program 9 times [2021-06-12 22:20:03,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:20:03,533 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921273108] [2021-06-12 22:20:03,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:20:03,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:20:03,711 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:20:03,711 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:20:03,711 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921273108] [2021-06-12 22:20:03,712 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [921273108] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:20:03,712 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [946616675] [2021-06-12 22:20:03,712 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:20:03,741 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 22:20:03,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:20:03,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 22:20:03,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:20:03,880 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-12 22:20:03,883 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:20:03,892 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:20:03,893 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:20:03,893 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:23 [2021-06-12 22:20:04,036 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:20:04,036 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [946616675] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:20:04,036 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:20:04,036 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-06-12 22:20:04,036 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284879184] [2021-06-12 22:20:04,036 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 22:20:04,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:20:04,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 22:20:04,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-06-12 22:20:04,037 INFO L87 Difference]: Start difference. First operand 1666 states and 4872 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:20:04,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:20:04,729 INFO L93 Difference]: Finished difference Result 2668 states and 7671 transitions. [2021-06-12 22:20:04,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-12 22:20:04,730 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 22:20:04,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:20:04,735 INFO L225 Difference]: With dead ends: 2668 [2021-06-12 22:20:04,735 INFO L226 Difference]: Without dead ends: 2653 [2021-06-12 22:20:04,735 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 642.5ms TimeCoverageRelationStatistics Valid=188, Invalid=868, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 22:20:04,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2653 states. [2021-06-12 22:20:04,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2653 to 1708. [2021-06-12 22:20:04,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1708 states, 1707 states have (on average 2.919742237844171) internal successors, (4984), 1707 states have internal predecessors, (4984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:20:04,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1708 states to 1708 states and 4984 transitions. [2021-06-12 22:20:04,773 INFO L78 Accepts]: Start accepts. Automaton has 1708 states and 4984 transitions. Word has length 33 [2021-06-12 22:20:04,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:20:04,774 INFO L482 AbstractCegarLoop]: Abstraction has 1708 states and 4984 transitions. [2021-06-12 22:20:04,774 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:20:04,774 INFO L276 IsEmpty]: Start isEmpty. Operand 1708 states and 4984 transitions. [2021-06-12 22:20:04,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 22:20:04,777 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:20:04,777 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:20:04,992 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:20:04,993 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:20:04,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:20:04,993 INFO L82 PathProgramCache]: Analyzing trace with hash -825878960, now seen corresponding path program 10 times [2021-06-12 22:20:04,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:20:04,993 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921481729] [2021-06-12 22:20:04,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:20:05,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:20:05,181 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:20:05,181 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:20:05,181 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921481729] [2021-06-12 22:20:05,181 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [921481729] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:20:05,181 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1870700770] [2021-06-12 22:20:05,182 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:20:05,214 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:20:05,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:20:05,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 22:20:05,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:20:05,421 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:20:05,421 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1870700770] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:20:05,421 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:20:05,421 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-12 22:20:05,421 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108587377] [2021-06-12 22:20:05,422 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 22:20:05,422 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:20:05,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 22:20:05,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-06-12 22:20:05,422 INFO L87 Difference]: Start difference. First operand 1708 states and 4984 transitions. Second operand has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 16 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:20:06,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:20:06,009 INFO L93 Difference]: Finished difference Result 2631 states and 7576 transitions. [2021-06-12 22:20:06,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 22:20:06,015 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 16 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 22:20:06,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:20:06,021 INFO L225 Difference]: With dead ends: 2631 [2021-06-12 22:20:06,021 INFO L226 Difference]: Without dead ends: 2616 [2021-06-12 22:20:06,022 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 558.2ms TimeCoverageRelationStatistics Valid=129, Invalid=573, Unknown=0, NotChecked=0, Total=702 [2021-06-12 22:20:06,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2616 states. [2021-06-12 22:20:06,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2616 to 1708. [2021-06-12 22:20:06,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1708 states, 1707 states have (on average 2.919742237844171) internal successors, (4984), 1707 states have internal predecessors, (4984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:20:06,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1708 states to 1708 states and 4984 transitions. [2021-06-12 22:20:06,059 INFO L78 Accepts]: Start accepts. Automaton has 1708 states and 4984 transitions. Word has length 33 [2021-06-12 22:20:06,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:20:06,059 INFO L482 AbstractCegarLoop]: Abstraction has 1708 states and 4984 transitions. [2021-06-12 22:20:06,059 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 16 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:20:06,059 INFO L276 IsEmpty]: Start isEmpty. Operand 1708 states and 4984 transitions. [2021-06-12 22:20:06,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 22:20:06,062 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:20:06,062 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:20:06,286 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:20:06,286 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:20:06,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:20:06,287 INFO L82 PathProgramCache]: Analyzing trace with hash 1945700966, now seen corresponding path program 11 times [2021-06-12 22:20:06,287 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:20:06,287 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033281676] [2021-06-12 22:20:06,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:20:06,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:20:06,476 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:20:06,476 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:20:06,476 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033281676] [2021-06-12 22:20:06,476 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2033281676] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:20:06,476 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [392258868] [2021-06-12 22:20:06,477 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:20:06,522 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:20:06,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:20:06,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 22:20:06,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:20:06,773 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:20:06,774 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [392258868] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:20:06,774 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:20:06,774 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-12 22:20:06,774 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669710955] [2021-06-12 22:20:06,774 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 22:20:06,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:20:06,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 22:20:06,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-06-12 22:20:06,775 INFO L87 Difference]: Start difference. First operand 1708 states and 4984 transitions. Second operand has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 16 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:20:07,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:20:07,668 INFO L93 Difference]: Finished difference Result 2160 states and 6221 transitions. [2021-06-12 22:20:07,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 22:20:07,669 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 16 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 22:20:07,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:20:07,676 INFO L225 Difference]: With dead ends: 2160 [2021-06-12 22:20:07,676 INFO L226 Difference]: Without dead ends: 2145 [2021-06-12 22:20:07,676 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 906.1ms TimeCoverageRelationStatistics Valid=172, Invalid=758, Unknown=0, NotChecked=0, Total=930 [2021-06-12 22:20:07,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2145 states. [2021-06-12 22:20:07,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2145 to 1734. [2021-06-12 22:20:07,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1734 states, 1733 states have (on average 2.928447778418927) internal successors, (5075), 1733 states have internal predecessors, (5075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:20:07,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1734 states to 1734 states and 5075 transitions. [2021-06-12 22:20:07,728 INFO L78 Accepts]: Start accepts. Automaton has 1734 states and 5075 transitions. Word has length 33 [2021-06-12 22:20:07,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:20:07,728 INFO L482 AbstractCegarLoop]: Abstraction has 1734 states and 5075 transitions. [2021-06-12 22:20:07,728 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 16 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:20:07,728 INFO L276 IsEmpty]: Start isEmpty. Operand 1734 states and 5075 transitions. [2021-06-12 22:20:07,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 22:20:07,732 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:20:07,732 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:20:07,944 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-06-12 22:20:07,945 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:20:07,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:20:07,945 INFO L82 PathProgramCache]: Analyzing trace with hash 1069518502, now seen corresponding path program 12 times [2021-06-12 22:20:07,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:20:07,945 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283899880] [2021-06-12 22:20:07,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:20:07,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:20:08,119 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:20:08,120 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:20:08,120 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283899880] [2021-06-12 22:20:08,120 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1283899880] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:20:08,120 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1526297245] [2021-06-12 22:20:08,120 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:20:08,161 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-12 22:20:08,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:20:08,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 22:20:08,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:20:08,279 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-12 22:20:08,281 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:20:08,288 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:20:08,289 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:20:08,289 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:19 [2021-06-12 22:20:08,453 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:20:08,453 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1526297245] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:20:08,453 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:20:08,454 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-06-12 22:20:08,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173998329] [2021-06-12 22:20:08,454 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 22:20:08,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:20:08,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 22:20:08,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2021-06-12 22:20:08,455 INFO L87 Difference]: Start difference. First operand 1734 states and 5075 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:20:09,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:20:09,274 INFO L93 Difference]: Finished difference Result 2188 states and 6280 transitions. [2021-06-12 22:20:09,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 22:20:09,274 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 22:20:09,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:20:09,277 INFO L225 Difference]: With dead ends: 2188 [2021-06-12 22:20:09,277 INFO L226 Difference]: Without dead ends: 2169 [2021-06-12 22:20:09,277 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 861.3ms TimeCoverageRelationStatistics Valid=201, Invalid=989, Unknown=0, NotChecked=0, Total=1190 [2021-06-12 22:20:09,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2169 states. [2021-06-12 22:20:09,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2169 to 1730. [2021-06-12 22:20:09,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1730 states, 1729 states have (on average 2.925968768074031) internal successors, (5059), 1729 states have internal predecessors, (5059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:20:09,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1730 states to 1730 states and 5059 transitions. [2021-06-12 22:20:09,316 INFO L78 Accepts]: Start accepts. Automaton has 1730 states and 5059 transitions. Word has length 33 [2021-06-12 22:20:09,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:20:09,316 INFO L482 AbstractCegarLoop]: Abstraction has 1730 states and 5059 transitions. [2021-06-12 22:20:09,316 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:20:09,316 INFO L276 IsEmpty]: Start isEmpty. Operand 1730 states and 5059 transitions. [2021-06-12 22:20:09,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 22:20:09,319 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:20:09,319 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:20:09,541 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-06-12 22:20:09,541 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:20:09,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:20:09,541 INFO L82 PathProgramCache]: Analyzing trace with hash -1981401434, now seen corresponding path program 13 times [2021-06-12 22:20:09,542 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:20:09,542 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082899675] [2021-06-12 22:20:09,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:20:09,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:20:09,713 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:20:09,713 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:20:09,713 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082899675] [2021-06-12 22:20:09,713 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1082899675] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:20:09,713 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1880468292] [2021-06-12 22:20:09,713 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:20:09,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:20:09,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 22:20:09,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:20:09,981 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:20:09,981 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1880468292] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:20:09,981 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:20:09,981 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-12 22:20:09,981 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883555004] [2021-06-12 22:20:09,981 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 22:20:09,981 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:20:09,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 22:20:09,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-06-12 22:20:09,982 INFO L87 Difference]: Start difference. First operand 1730 states and 5059 transitions. Second operand has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 16 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:20:10,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:20:10,886 INFO L93 Difference]: Finished difference Result 2225 states and 6381 transitions. [2021-06-12 22:20:10,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 22:20:10,887 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 16 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 22:20:10,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:20:10,889 INFO L225 Difference]: With dead ends: 2225 [2021-06-12 22:20:10,889 INFO L226 Difference]: Without dead ends: 2210 [2021-06-12 22:20:10,890 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 883.3ms TimeCoverageRelationStatistics Valid=172, Invalid=758, Unknown=0, NotChecked=0, Total=930 [2021-06-12 22:20:10,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2210 states. [2021-06-12 22:20:10,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2210 to 1751. [2021-06-12 22:20:10,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1751 states, 1750 states have (on average 2.934857142857143) internal successors, (5136), 1750 states have internal predecessors, (5136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:20:10,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1751 states to 1751 states and 5136 transitions. [2021-06-12 22:20:10,922 INFO L78 Accepts]: Start accepts. Automaton has 1751 states and 5136 transitions. Word has length 33 [2021-06-12 22:20:10,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:20:10,922 INFO L482 AbstractCegarLoop]: Abstraction has 1751 states and 5136 transitions. [2021-06-12 22:20:10,923 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 16 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:20:10,923 INFO L276 IsEmpty]: Start isEmpty. Operand 1751 states and 5136 transitions. [2021-06-12 22:20:10,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 22:20:10,926 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:20:10,926 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:20:11,140 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-06-12 22:20:11,141 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:20:11,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:20:11,141 INFO L82 PathProgramCache]: Analyzing trace with hash -217731504, now seen corresponding path program 14 times [2021-06-12 22:20:11,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:20:11,141 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165750160] [2021-06-12 22:20:11,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:20:11,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:20:11,328 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:20:11,329 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:20:11,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165750160] [2021-06-12 22:20:11,329 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [165750160] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:20:11,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [951855527] [2021-06-12 22:20:11,329 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:20:11,370 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:20:11,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:20:11,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 22:20:11,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:20:11,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-12 22:20:11,476 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:20:11,483 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:20:11,483 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:20:11,484 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:19 [2021-06-12 22:20:11,707 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:20:11,713 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [951855527] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:20:11,713 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:20:11,713 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-06-12 22:20:11,713 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287947492] [2021-06-12 22:20:11,713 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 22:20:11,713 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:20:11,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 22:20:11,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2021-06-12 22:20:11,714 INFO L87 Difference]: Start difference. First operand 1751 states and 5136 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:20:12,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:20:12,465 INFO L93 Difference]: Finished difference Result 2279 states and 6491 transitions. [2021-06-12 22:20:12,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 22:20:12,466 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 22:20:12,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:20:12,468 INFO L225 Difference]: With dead ends: 2279 [2021-06-12 22:20:12,468 INFO L226 Difference]: Without dead ends: 2264 [2021-06-12 22:20:12,468 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 866.4ms TimeCoverageRelationStatistics Valid=201, Invalid=989, Unknown=0, NotChecked=0, Total=1190 [2021-06-12 22:20:12,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2264 states. [2021-06-12 22:20:12,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2264 to 1730. [2021-06-12 22:20:12,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1730 states, 1729 states have (on average 2.925968768074031) internal successors, (5059), 1729 states have internal predecessors, (5059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:20:12,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1730 states to 1730 states and 5059 transitions. [2021-06-12 22:20:12,500 INFO L78 Accepts]: Start accepts. Automaton has 1730 states and 5059 transitions. Word has length 33 [2021-06-12 22:20:12,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:20:12,500 INFO L482 AbstractCegarLoop]: Abstraction has 1730 states and 5059 transitions. [2021-06-12 22:20:12,500 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:20:12,500 INFO L276 IsEmpty]: Start isEmpty. Operand 1730 states and 5059 transitions. [2021-06-12 22:20:12,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 22:20:12,503 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:20:12,503 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:20:12,716 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:20:12,717 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:20:12,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:20:12,717 INFO L82 PathProgramCache]: Analyzing trace with hash -157435162, now seen corresponding path program 15 times [2021-06-12 22:20:12,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:20:12,717 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369928768] [2021-06-12 22:20:12,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:20:12,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:20:12,874 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:20:12,874 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:20:12,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369928768] [2021-06-12 22:20:12,874 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1369928768] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:20:12,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [64680160] [2021-06-12 22:20:12,874 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:20:12,904 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 22:20:12,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:20:12,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 22:20:12,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:20:13,033 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-12 22:20:13,034 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:20:13,042 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:20:13,043 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:20:13,043 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:19 [2021-06-12 22:20:13,229 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:20:13,230 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [64680160] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:20:13,230 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:20:13,230 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-06-12 22:20:13,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757629701] [2021-06-12 22:20:13,230 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 22:20:13,230 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:20:13,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 22:20:13,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2021-06-12 22:20:13,231 INFO L87 Difference]: Start difference. First operand 1730 states and 5059 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:20:13,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:20:13,726 INFO L93 Difference]: Finished difference Result 2313 states and 6721 transitions. [2021-06-12 22:20:13,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 22:20:13,727 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 22:20:13,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:20:13,729 INFO L225 Difference]: With dead ends: 2313 [2021-06-12 22:20:13,730 INFO L226 Difference]: Without dead ends: 2294 [2021-06-12 22:20:13,730 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 600.7ms TimeCoverageRelationStatistics Valid=163, Invalid=707, Unknown=0, NotChecked=0, Total=870 [2021-06-12 22:20:13,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2294 states. [2021-06-12 22:20:13,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2294 to 1752. [2021-06-12 22:20:13,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1752 states, 1751 states have (on average 2.9194745859508853) internal successors, (5112), 1751 states have internal predecessors, (5112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:20:13,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1752 states to 1752 states and 5112 transitions. [2021-06-12 22:20:13,758 INFO L78 Accepts]: Start accepts. Automaton has 1752 states and 5112 transitions. Word has length 33 [2021-06-12 22:20:13,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:20:13,758 INFO L482 AbstractCegarLoop]: Abstraction has 1752 states and 5112 transitions. [2021-06-12 22:20:13,758 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:20:13,759 INFO L276 IsEmpty]: Start isEmpty. Operand 1752 states and 5112 transitions. [2021-06-12 22:20:13,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 22:20:13,762 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:20:13,762 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:20:13,983 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-06-12 22:20:13,983 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:20:13,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:20:13,984 INFO L82 PathProgramCache]: Analyzing trace with hash -764872922, now seen corresponding path program 16 times [2021-06-12 22:20:13,984 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:20:13,984 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481879204] [2021-06-12 22:20:13,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:20:13,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:20:14,153 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:20:14,154 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:20:14,154 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481879204] [2021-06-12 22:20:14,154 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481879204] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:20:14,154 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [258127532] [2021-06-12 22:20:14,154 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:20:14,192 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:20:14,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:20:14,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 22:20:14,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:20:14,400 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:20:14,400 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [258127532] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:20:14,400 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:20:14,400 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-12 22:20:14,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3640828] [2021-06-12 22:20:14,401 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 22:20:14,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:20:14,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 22:20:14,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-06-12 22:20:14,402 INFO L87 Difference]: Start difference. First operand 1752 states and 5112 transitions. Second operand has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 16 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:20:14,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:20:14,908 INFO L93 Difference]: Finished difference Result 2339 states and 6772 transitions. [2021-06-12 22:20:14,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 22:20:14,908 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 16 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 22:20:14,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:20:14,910 INFO L225 Difference]: With dead ends: 2339 [2021-06-12 22:20:14,910 INFO L226 Difference]: Without dead ends: 2324 [2021-06-12 22:20:14,911 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 525.1ms TimeCoverageRelationStatistics Valid=119, Invalid=531, Unknown=0, NotChecked=0, Total=650 [2021-06-12 22:20:14,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2324 states. [2021-06-12 22:20:14,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2324 to 1752. [2021-06-12 22:20:14,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1752 states, 1751 states have (on average 2.9194745859508853) internal successors, (5112), 1751 states have internal predecessors, (5112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:20:14,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1752 states to 1752 states and 5112 transitions. [2021-06-12 22:20:14,936 INFO L78 Accepts]: Start accepts. Automaton has 1752 states and 5112 transitions. Word has length 33 [2021-06-12 22:20:14,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:20:14,936 INFO L482 AbstractCegarLoop]: Abstraction has 1752 states and 5112 transitions. [2021-06-12 22:20:14,936 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 16 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:20:14,936 INFO L276 IsEmpty]: Start isEmpty. Operand 1752 states and 5112 transitions. [2021-06-12 22:20:14,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 22:20:14,939 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:20:14,939 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:20:15,160 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:20:15,161 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:20:15,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:20:15,161 INFO L82 PathProgramCache]: Analyzing trace with hash -227710150, now seen corresponding path program 17 times [2021-06-12 22:20:15,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:20:15,161 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141857026] [2021-06-12 22:20:15,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:20:15,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:20:15,352 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:20:15,352 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:20:15,352 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141857026] [2021-06-12 22:20:15,352 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [141857026] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:20:15,352 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [614974109] [2021-06-12 22:20:15,352 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:20:15,389 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:20:15,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:20:15,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 22:20:15,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:20:15,623 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:20:15,624 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [614974109] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:20:15,624 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:20:15,624 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-12 22:20:15,624 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582417459] [2021-06-12 22:20:15,624 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 22:20:15,624 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:20:15,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 22:20:15,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-06-12 22:20:15,625 INFO L87 Difference]: Start difference. First operand 1752 states and 5112 transitions. Second operand has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 16 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:20:16,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:20:16,664 INFO L93 Difference]: Finished difference Result 2321 states and 6657 transitions. [2021-06-12 22:20:16,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-12 22:20:16,665 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 16 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 22:20:16,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:20:16,667 INFO L225 Difference]: With dead ends: 2321 [2021-06-12 22:20:16,667 INFO L226 Difference]: Without dead ends: 2306 [2021-06-12 22:20:16,667 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 1017.2ms TimeCoverageRelationStatistics Valid=219, Invalid=1041, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 22:20:16,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2306 states. [2021-06-12 22:20:16,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2306 to 1760. [2021-06-12 22:20:16,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1760 states, 1759 states have (on average 2.922114837976123) internal successors, (5140), 1759 states have internal predecessors, (5140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:20:16,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1760 states to 1760 states and 5140 transitions. [2021-06-12 22:20:16,694 INFO L78 Accepts]: Start accepts. Automaton has 1760 states and 5140 transitions. Word has length 33 [2021-06-12 22:20:16,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:20:16,694 INFO L482 AbstractCegarLoop]: Abstraction has 1760 states and 5140 transitions. [2021-06-12 22:20:16,694 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 16 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:20:16,694 INFO L276 IsEmpty]: Start isEmpty. Operand 1760 states and 5140 transitions. [2021-06-12 22:20:16,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 22:20:16,697 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:20:16,697 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:20:16,912 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:20:16,913 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:20:16,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:20:16,913 INFO L82 PathProgramCache]: Analyzing trace with hash -1103892614, now seen corresponding path program 18 times [2021-06-12 22:20:16,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:20:16,913 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071240397] [2021-06-12 22:20:16,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:20:16,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:20:17,093 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:20:17,093 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:20:17,093 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071240397] [2021-06-12 22:20:17,093 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1071240397] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:20:17,093 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [159341612] [2021-06-12 22:20:17,093 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:20:17,133 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-12 22:20:17,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:20:17,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 22:20:17,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:20:17,253 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-12 22:20:17,254 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:20:17,261 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:20:17,262 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:20:17,262 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:19 [2021-06-12 22:20:17,443 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:20:17,443 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [159341612] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:20:17,443 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:20:17,443 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-06-12 22:20:17,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535451919] [2021-06-12 22:20:17,443 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 22:20:17,443 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:20:17,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 22:20:17,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2021-06-12 22:20:17,444 INFO L87 Difference]: Start difference. First operand 1760 states and 5140 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:20:18,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:20:18,152 INFO L93 Difference]: Finished difference Result 2573 states and 7435 transitions. [2021-06-12 22:20:18,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-12 22:20:18,153 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 22:20:18,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:20:18,156 INFO L225 Difference]: With dead ends: 2573 [2021-06-12 22:20:18,156 INFO L226 Difference]: Without dead ends: 2554 [2021-06-12 22:20:18,157 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 753.7ms TimeCoverageRelationStatistics Valid=202, Invalid=988, Unknown=0, NotChecked=0, Total=1190 [2021-06-12 22:20:18,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2554 states. [2021-06-12 22:20:18,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2554 to 1752. [2021-06-12 22:20:18,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1752 states, 1751 states have (on average 2.9194745859508853) internal successors, (5112), 1751 states have internal predecessors, (5112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:20:18,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1752 states to 1752 states and 5112 transitions. [2021-06-12 22:20:18,202 INFO L78 Accepts]: Start accepts. Automaton has 1752 states and 5112 transitions. Word has length 33 [2021-06-12 22:20:18,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:20:18,203 INFO L482 AbstractCegarLoop]: Abstraction has 1752 states and 5112 transitions. [2021-06-12 22:20:18,203 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:20:18,203 INFO L276 IsEmpty]: Start isEmpty. Operand 1752 states and 5112 transitions. [2021-06-12 22:20:18,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 22:20:18,205 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:20:18,206 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:20:18,416 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-06-12 22:20:18,417 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:20:18,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:20:18,417 INFO L82 PathProgramCache]: Analyzing trace with hash 1911160746, now seen corresponding path program 19 times [2021-06-12 22:20:18,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:20:18,417 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377667367] [2021-06-12 22:20:18,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:20:18,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:20:18,617 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:20:18,617 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:20:18,617 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377667367] [2021-06-12 22:20:18,617 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1377667367] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:20:18,618 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [424034311] [2021-06-12 22:20:18,618 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:20:18,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:20:18,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 22:20:18,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:20:18,908 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:20:18,909 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [424034311] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:20:18,909 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:20:18,909 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-12 22:20:18,909 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736621738] [2021-06-12 22:20:18,909 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 22:20:18,909 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:20:18,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 22:20:18,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-06-12 22:20:18,910 INFO L87 Difference]: Start difference. First operand 1752 states and 5112 transitions. Second operand has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 16 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:20:20,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:20:20,004 INFO L93 Difference]: Finished difference Result 2455 states and 6989 transitions. [2021-06-12 22:20:20,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-12 22:20:20,004 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 16 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 22:20:20,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:20:20,007 INFO L225 Difference]: With dead ends: 2455 [2021-06-12 22:20:20,007 INFO L226 Difference]: Without dead ends: 2440 [2021-06-12 22:20:20,007 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 1140.0ms TimeCoverageRelationStatistics Valid=219, Invalid=1041, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 22:20:20,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2440 states. [2021-06-12 22:20:20,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2440 to 1794. [2021-06-12 22:20:20,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1794 states, 1793 states have (on average 2.92526491912995) internal successors, (5245), 1793 states have internal predecessors, (5245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:20:20,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1794 states to 1794 states and 5245 transitions. [2021-06-12 22:20:20,032 INFO L78 Accepts]: Start accepts. Automaton has 1794 states and 5245 transitions. Word has length 33 [2021-06-12 22:20:20,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:20:20,032 INFO L482 AbstractCegarLoop]: Abstraction has 1794 states and 5245 transitions. [2021-06-12 22:20:20,032 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 16 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:20:20,032 INFO L276 IsEmpty]: Start isEmpty. Operand 1794 states and 5245 transitions. [2021-06-12 22:20:20,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 22:20:20,035 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:20:20,035 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:20:20,248 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:20:20,249 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:20:20,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:20:20,249 INFO L82 PathProgramCache]: Analyzing trace with hash -620136620, now seen corresponding path program 20 times [2021-06-12 22:20:20,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:20:20,249 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806483572] [2021-06-12 22:20:20,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:20:20,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:20:20,562 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:20:20,562 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:20:20,562 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806483572] [2021-06-12 22:20:20,562 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1806483572] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:20:20,563 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [223896934] [2021-06-12 22:20:20,563 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:20:20,606 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:20:20,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:20:20,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 22:20:20,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:20:20,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-12 22:20:20,706 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:20:20,713 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:20:20,713 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:20:20,714 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:19 [2021-06-12 22:20:20,877 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:20:20,878 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [223896934] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:20:20,878 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:20:20,878 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-06-12 22:20:20,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820664099] [2021-06-12 22:20:20,878 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 22:20:20,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:20:20,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 22:20:20,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2021-06-12 22:20:20,879 INFO L87 Difference]: Start difference. First operand 1794 states and 5245 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:20:21,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:20:21,585 INFO L93 Difference]: Finished difference Result 2707 states and 7767 transitions. [2021-06-12 22:20:21,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-12 22:20:21,585 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 22:20:21,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:20:21,588 INFO L225 Difference]: With dead ends: 2707 [2021-06-12 22:20:21,588 INFO L226 Difference]: Without dead ends: 2692 [2021-06-12 22:20:21,588 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 846.6ms TimeCoverageRelationStatistics Valid=202, Invalid=988, Unknown=0, NotChecked=0, Total=1190 [2021-06-12 22:20:21,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2692 states. [2021-06-12 22:20:21,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2692 to 1752. [2021-06-12 22:20:21,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1752 states, 1751 states have (on average 2.9194745859508853) internal successors, (5112), 1751 states have internal predecessors, (5112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:20:21,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1752 states to 1752 states and 5112 transitions. [2021-06-12 22:20:21,614 INFO L78 Accepts]: Start accepts. Automaton has 1752 states and 5112 transitions. Word has length 33 [2021-06-12 22:20:21,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:20:21,615 INFO L482 AbstractCegarLoop]: Abstraction has 1752 states and 5112 transitions. [2021-06-12 22:20:21,615 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:20:21,615 INFO L276 IsEmpty]: Start isEmpty. Operand 1752 states and 5112 transitions. [2021-06-12 22:20:21,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 22:20:21,617 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:20:21,618 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:20:21,832 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-06-12 22:20:21,833 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:20:21,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:20:21,833 INFO L82 PathProgramCache]: Analyzing trace with hash -1165834872, now seen corresponding path program 21 times [2021-06-12 22:20:21,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:20:21,833 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891862826] [2021-06-12 22:20:21,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:20:21,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:20:22,027 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:20:22,027 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:20:22,027 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891862826] [2021-06-12 22:20:22,027 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891862826] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:20:22,027 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1609950321] [2021-06-12 22:20:22,027 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:20:22,059 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 22:20:22,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:20:22,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 22:20:22,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:20:22,155 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-12 22:20:22,156 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:20:22,162 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:20:22,163 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:20:22,163 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:19 [2021-06-12 22:20:22,316 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:20:22,316 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1609950321] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:20:22,317 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:20:22,317 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-06-12 22:20:22,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951034220] [2021-06-12 22:20:22,317 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 22:20:22,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:20:22,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 22:20:22,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-06-12 22:20:22,318 INFO L87 Difference]: Start difference. First operand 1752 states and 5112 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:20:23,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:20:23,442 INFO L93 Difference]: Finished difference Result 2406 states and 6882 transitions. [2021-06-12 22:20:23,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-12 22:20:23,443 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 22:20:23,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:20:23,445 INFO L225 Difference]: With dead ends: 2406 [2021-06-12 22:20:23,445 INFO L226 Difference]: Without dead ends: 2391 [2021-06-12 22:20:23,446 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 1105.5ms TimeCoverageRelationStatistics Valid=278, Invalid=1362, Unknown=0, NotChecked=0, Total=1640 [2021-06-12 22:20:23,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2391 states. [2021-06-12 22:20:23,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2391 to 1756. [2021-06-12 22:20:23,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1756 states, 1755 states have (on average 2.921937321937322) internal successors, (5128), 1755 states have internal predecessors, (5128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:20:23,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1756 states to 1756 states and 5128 transitions. [2021-06-12 22:20:23,469 INFO L78 Accepts]: Start accepts. Automaton has 1756 states and 5128 transitions. Word has length 33 [2021-06-12 22:20:23,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:20:23,469 INFO L482 AbstractCegarLoop]: Abstraction has 1756 states and 5128 transitions. [2021-06-12 22:20:23,469 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:20:23,470 INFO L276 IsEmpty]: Start isEmpty. Operand 1756 states and 5128 transitions. [2021-06-12 22:20:23,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 22:20:23,472 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:20:23,472 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:20:23,689 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-06-12 22:20:23,690 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:20:23,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:20:23,690 INFO L82 PathProgramCache]: Analyzing trace with hash -2042017336, now seen corresponding path program 22 times [2021-06-12 22:20:23,690 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:20:23,690 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032047969] [2021-06-12 22:20:23,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:20:23,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:20:23,854 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:20:23,854 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:20:23,854 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032047969] [2021-06-12 22:20:23,854 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1032047969] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:20:23,854 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [225271190] [2021-06-12 22:20:23,854 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:20:23,884 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:20:23,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:20:23,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 22:20:23,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:20:24,094 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:20:24,094 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [225271190] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:20:24,094 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:20:24,094 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-12 22:20:24,094 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504336432] [2021-06-12 22:20:24,094 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 22:20:24,094 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:20:24,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 22:20:24,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-06-12 22:20:24,095 INFO L87 Difference]: Start difference. First operand 1756 states and 5128 transitions. Second operand has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 16 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:20:24,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:20:24,832 INFO L93 Difference]: Finished difference Result 2707 states and 7778 transitions. [2021-06-12 22:20:24,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-12 22:20:24,833 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 16 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 22:20:24,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:20:24,836 INFO L225 Difference]: With dead ends: 2707 [2021-06-12 22:20:24,836 INFO L226 Difference]: Without dead ends: 2688 [2021-06-12 22:20:24,836 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 673.6ms TimeCoverageRelationStatistics Valid=154, Invalid=776, Unknown=0, NotChecked=0, Total=930 [2021-06-12 22:20:24,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2688 states. [2021-06-12 22:20:24,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2688 to 1744. [2021-06-12 22:20:24,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1744 states, 1743 states have (on average 2.919104991394148) internal successors, (5088), 1743 states have internal predecessors, (5088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:20:24,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1744 states to 1744 states and 5088 transitions. [2021-06-12 22:20:24,857 INFO L78 Accepts]: Start accepts. Automaton has 1744 states and 5088 transitions. Word has length 33 [2021-06-12 22:20:24,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:20:24,857 INFO L482 AbstractCegarLoop]: Abstraction has 1744 states and 5088 transitions. [2021-06-12 22:20:24,857 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 16 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:20:24,857 INFO L276 IsEmpty]: Start isEmpty. Operand 1744 states and 5088 transitions. [2021-06-12 22:20:24,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 22:20:24,860 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:20:24,860 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:20:25,061 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:20:25,062 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:20:25,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:20:25,062 INFO L82 PathProgramCache]: Analyzing trace with hash -172508442, now seen corresponding path program 23 times [2021-06-12 22:20:25,062 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:20:25,062 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439463391] [2021-06-12 22:20:25,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:20:25,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:20:25,237 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:20:25,238 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:20:25,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439463391] [2021-06-12 22:20:25,239 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1439463391] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:20:25,239 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999488128] [2021-06-12 22:20:25,239 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:20:25,284 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:20:25,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:20:25,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 22:20:25,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:20:25,509 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:20:25,509 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1999488128] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:20:25,509 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:20:25,509 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-12 22:20:25,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036458984] [2021-06-12 22:20:25,510 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 22:20:25,510 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:20:25,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 22:20:25,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-06-12 22:20:25,510 INFO L87 Difference]: Start difference. First operand 1744 states and 5088 transitions. Second operand has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 16 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:20:26,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:20:26,396 INFO L93 Difference]: Finished difference Result 2266 states and 6481 transitions. [2021-06-12 22:20:26,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-12 22:20:26,396 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 16 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 22:20:26,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:20:26,399 INFO L225 Difference]: With dead ends: 2266 [2021-06-12 22:20:26,399 INFO L226 Difference]: Without dead ends: 2251 [2021-06-12 22:20:26,399 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 905.1ms TimeCoverageRelationStatistics Valid=186, Invalid=870, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 22:20:26,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2251 states. [2021-06-12 22:20:26,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2251 to 1765. [2021-06-12 22:20:26,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1765 states, 1764 states have (on average 2.9280045351473922) internal successors, (5165), 1764 states have internal predecessors, (5165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:20:26,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1765 states to 1765 states and 5165 transitions. [2021-06-12 22:20:26,425 INFO L78 Accepts]: Start accepts. Automaton has 1765 states and 5165 transitions. Word has length 33 [2021-06-12 22:20:26,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:20:26,425 INFO L482 AbstractCegarLoop]: Abstraction has 1765 states and 5165 transitions. [2021-06-12 22:20:26,425 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 16 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:20:26,425 INFO L276 IsEmpty]: Start isEmpty. Operand 1765 states and 5165 transitions. [2021-06-12 22:20:26,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 22:20:26,428 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:20:26,428 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:20:26,648 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-06-12 22:20:26,649 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:20:26,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:20:26,649 INFO L82 PathProgramCache]: Analyzing trace with hash 1591161488, now seen corresponding path program 24 times [2021-06-12 22:20:26,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:20:26,649 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229885706] [2021-06-12 22:20:26,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:20:26,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:20:26,840 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:20:26,841 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:20:26,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229885706] [2021-06-12 22:20:26,841 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [229885706] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:20:26,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [113197968] [2021-06-12 22:20:26,841 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:20:26,873 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 22:20:26,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:20:26,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 22:20:26,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:20:27,106 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:20:27,106 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [113197968] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:20:27,106 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:20:27,107 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-06-12 22:20:27,107 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743661166] [2021-06-12 22:20:27,107 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 22:20:27,107 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:20:27,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 22:20:27,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2021-06-12 22:20:27,108 INFO L87 Difference]: Start difference. First operand 1765 states and 5165 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:20:27,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:20:27,883 INFO L93 Difference]: Finished difference Result 2604 states and 7487 transitions. [2021-06-12 22:20:27,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-12 22:20:27,883 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 22:20:27,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:20:27,886 INFO L225 Difference]: With dead ends: 2604 [2021-06-12 22:20:27,886 INFO L226 Difference]: Without dead ends: 2589 [2021-06-12 22:20:27,886 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 808.5ms TimeCoverageRelationStatistics Valid=194, Invalid=928, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 22:20:27,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2589 states. [2021-06-12 22:20:27,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2589 to 1702. [2021-06-12 22:20:27,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1702 states, 1701 states have (on average 2.9253380364491477) internal successors, (4976), 1701 states have internal predecessors, (4976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:20:27,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1702 states to 1702 states and 4976 transitions. [2021-06-12 22:20:27,907 INFO L78 Accepts]: Start accepts. Automaton has 1702 states and 4976 transitions. Word has length 33 [2021-06-12 22:20:27,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:20:27,907 INFO L482 AbstractCegarLoop]: Abstraction has 1702 states and 4976 transitions. [2021-06-12 22:20:27,907 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:20:27,907 INFO L276 IsEmpty]: Start isEmpty. Operand 1702 states and 4976 transitions. [2021-06-12 22:20:27,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 22:20:27,909 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:20:27,909 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:20:28,110 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:20:28,110 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:20:28,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:20:28,110 INFO L82 PathProgramCache]: Analyzing trace with hash -1787297184, now seen corresponding path program 25 times [2021-06-12 22:20:28,110 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:20:28,111 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910063525] [2021-06-12 22:20:28,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:20:28,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:20:28,401 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:20:28,401 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:20:28,401 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910063525] [2021-06-12 22:20:28,402 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1910063525] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:20:28,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [21254620] [2021-06-12 22:20:28,403 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:20:28,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:20:28,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 22:20:28,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:20:28,728 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:20:28,728 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [21254620] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:20:28,728 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:20:28,728 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 23 [2021-06-12 22:20:28,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279695766] [2021-06-12 22:20:28,729 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 22:20:28,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:20:28,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 22:20:28,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2021-06-12 22:20:28,729 INFO L87 Difference]: Start difference. First operand 1702 states and 4976 transitions. Second operand has 24 states, 24 states have (on average 2.625) internal successors, (63), 23 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:20:30,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:20:30,155 INFO L93 Difference]: Finished difference Result 3133 states and 8917 transitions. [2021-06-12 22:20:30,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-12 22:20:30,155 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.625) internal successors, (63), 23 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 22:20:30,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:20:30,160 INFO L225 Difference]: With dead ends: 3133 [2021-06-12 22:20:30,160 INFO L226 Difference]: Without dead ends: 3118 [2021-06-12 22:20:30,161 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 534 ImplicationChecksByTransitivity, 1165.0ms TimeCoverageRelationStatistics Valid=279, Invalid=1883, Unknown=0, NotChecked=0, Total=2162 [2021-06-12 22:20:30,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3118 states. [2021-06-12 22:20:30,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3118 to 1726. [2021-06-12 22:20:30,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1726 states, 1725 states have (on average 2.926376811594203) internal successors, (5048), 1725 states have internal predecessors, (5048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:20:30,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1726 states to 1726 states and 5048 transitions. [2021-06-12 22:20:30,201 INFO L78 Accepts]: Start accepts. Automaton has 1726 states and 5048 transitions. Word has length 33 [2021-06-12 22:20:30,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:20:30,201 INFO L482 AbstractCegarLoop]: Abstraction has 1726 states and 5048 transitions. [2021-06-12 22:20:30,201 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.625) internal successors, (63), 23 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:20:30,201 INFO L276 IsEmpty]: Start isEmpty. Operand 1726 states and 5048 transitions. [2021-06-12 22:20:30,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 22:20:30,204 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:20:30,204 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:20:30,426 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-06-12 22:20:30,426 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:20:30,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:20:30,426 INFO L82 PathProgramCache]: Analyzing trace with hash -1679846816, now seen corresponding path program 26 times [2021-06-12 22:20:30,426 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:20:30,426 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198615161] [2021-06-12 22:20:30,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:20:30,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:20:30,697 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:20:30,698 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:20:30,698 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198615161] [2021-06-12 22:20:30,698 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1198615161] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:20:30,698 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1922184031] [2021-06-12 22:20:30,698 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:20:30,744 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:20:30,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:20:30,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 22:20:30,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:20:30,882 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-12 22:20:30,883 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:20:30,890 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:20:30,891 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:20:30,891 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:21 [2021-06-12 22:20:31,088 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:20:31,089 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1922184031] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:20:31,089 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:20:31,089 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 24 [2021-06-12 22:20:31,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524597407] [2021-06-12 22:20:31,089 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 22:20:31,089 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:20:31,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 22:20:31,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=533, Unknown=0, NotChecked=0, Total=600 [2021-06-12 22:20:31,090 INFO L87 Difference]: Start difference. First operand 1726 states and 5048 transitions. Second operand has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:20:33,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:20:33,046 INFO L93 Difference]: Finished difference Result 2426 states and 6916 transitions. [2021-06-12 22:20:33,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-12 22:20:33,046 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 22:20:33,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:20:33,049 INFO L225 Difference]: With dead ends: 2426 [2021-06-12 22:20:33,049 INFO L226 Difference]: Without dead ends: 2411 [2021-06-12 22:20:33,050 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 816 ImplicationChecksByTransitivity, 1781.6ms TimeCoverageRelationStatistics Valid=375, Invalid=2817, Unknown=0, NotChecked=0, Total=3192 [2021-06-12 22:20:33,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2411 states. [2021-06-12 22:20:33,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2411 to 1738. [2021-06-12 22:20:33,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1738 states, 1737 states have (on average 2.929188255613126) internal successors, (5088), 1737 states have internal predecessors, (5088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:20:33,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1738 states to 1738 states and 5088 transitions. [2021-06-12 22:20:33,071 INFO L78 Accepts]: Start accepts. Automaton has 1738 states and 5088 transitions. Word has length 33 [2021-06-12 22:20:33,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:20:33,071 INFO L482 AbstractCegarLoop]: Abstraction has 1738 states and 5088 transitions. [2021-06-12 22:20:33,071 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:20:33,072 INFO L276 IsEmpty]: Start isEmpty. Operand 1738 states and 5088 transitions. [2021-06-12 22:20:33,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 22:20:33,073 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:20:33,074 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:20:33,274 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-06-12 22:20:33,274 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:20:33,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:20:33,275 INFO L82 PathProgramCache]: Analyzing trace with hash 1738938016, now seen corresponding path program 27 times [2021-06-12 22:20:33,275 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:20:33,275 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179895974] [2021-06-12 22:20:33,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:20:33,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:20:33,520 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:20:33,521 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:20:33,521 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179895974] [2021-06-12 22:20:33,521 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1179895974] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:20:33,521 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [106295831] [2021-06-12 22:20:33,521 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:20:33,549 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 22:20:33,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:20:33,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 22:20:33,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:20:33,699 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-12 22:20:33,700 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:20:33,706 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:20:33,707 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:20:33,707 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:21 [2021-06-12 22:20:33,845 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:20:33,846 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [106295831] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:20:33,846 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:20:33,846 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 24 [2021-06-12 22:20:33,846 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990670700] [2021-06-12 22:20:33,846 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 22:20:33,846 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:20:33,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 22:20:33,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2021-06-12 22:20:33,847 INFO L87 Difference]: Start difference. First operand 1738 states and 5088 transitions. Second operand has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:20:35,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:20:35,514 INFO L93 Difference]: Finished difference Result 2450 states and 7097 transitions. [2021-06-12 22:20:35,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-12 22:20:35,514 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 22:20:35,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:20:35,517 INFO L225 Difference]: With dead ends: 2450 [2021-06-12 22:20:35,517 INFO L226 Difference]: Without dead ends: 2431 [2021-06-12 22:20:35,518 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 662 ImplicationChecksByTransitivity, 1319.4ms TimeCoverageRelationStatistics Valid=315, Invalid=2337, Unknown=0, NotChecked=0, Total=2652 [2021-06-12 22:20:35,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2431 states. [2021-06-12 22:20:35,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2431 to 1734. [2021-06-12 22:20:35,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1734 states, 1733 states have (on average 2.9267166762839008) internal successors, (5072), 1733 states have internal predecessors, (5072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:20:35,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1734 states to 1734 states and 5072 transitions. [2021-06-12 22:20:35,548 INFO L78 Accepts]: Start accepts. Automaton has 1734 states and 5072 transitions. Word has length 33 [2021-06-12 22:20:35,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:20:35,548 INFO L482 AbstractCegarLoop]: Abstraction has 1734 states and 5072 transitions. [2021-06-12 22:20:35,548 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:20:35,548 INFO L276 IsEmpty]: Start isEmpty. Operand 1734 states and 5072 transitions. [2021-06-12 22:20:35,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 22:20:35,551 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:20:35,551 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:20:35,773 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:20:35,773 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:20:35,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:20:35,773 INFO L82 PathProgramCache]: Analyzing trace with hash 1880653156, now seen corresponding path program 28 times [2021-06-12 22:20:35,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:20:35,773 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616536622] [2021-06-12 22:20:35,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:20:35,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:20:36,016 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:20:36,017 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:20:36,017 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616536622] [2021-06-12 22:20:36,017 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1616536622] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:20:36,017 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2128090879] [2021-06-12 22:20:36,017 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:20:36,046 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:20:36,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:20:36,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 22:20:36,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:20:36,308 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:20:36,308 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2128090879] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:20:36,308 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:20:36,308 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 23 [2021-06-12 22:20:36,308 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944101747] [2021-06-12 22:20:36,309 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 22:20:36,309 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:20:36,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 22:20:36,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=473, Unknown=0, NotChecked=0, Total=552 [2021-06-12 22:20:36,309 INFO L87 Difference]: Start difference. First operand 1734 states and 5072 transitions. Second operand has 24 states, 24 states have (on average 2.625) internal successors, (63), 23 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:20:37,397 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 25 [2021-06-12 22:20:37,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:20:37,836 INFO L93 Difference]: Finished difference Result 3027 states and 8657 transitions. [2021-06-12 22:20:37,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-12 22:20:37,837 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.625) internal successors, (63), 23 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 22:20:37,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:20:37,840 INFO L225 Difference]: With dead ends: 3027 [2021-06-12 22:20:37,840 INFO L226 Difference]: Without dead ends: 3012 [2021-06-12 22:20:37,841 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 705 ImplicationChecksByTransitivity, 1359.6ms TimeCoverageRelationStatistics Valid=327, Invalid=2325, Unknown=0, NotChecked=0, Total=2652 [2021-06-12 22:20:37,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3012 states. [2021-06-12 22:20:37,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3012 to 1730. [2021-06-12 22:20:37,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1730 states, 1729 states have (on average 2.926547137073453) internal successors, (5060), 1729 states have internal predecessors, (5060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:20:37,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1730 states to 1730 states and 5060 transitions. [2021-06-12 22:20:37,869 INFO L78 Accepts]: Start accepts. Automaton has 1730 states and 5060 transitions. Word has length 33 [2021-06-12 22:20:37,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:20:37,869 INFO L482 AbstractCegarLoop]: Abstraction has 1730 states and 5060 transitions. [2021-06-12 22:20:37,870 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.625) internal successors, (63), 23 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:20:37,870 INFO L276 IsEmpty]: Start isEmpty. Operand 1730 states and 5060 transitions. [2021-06-12 22:20:37,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 22:20:37,872 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:20:37,872 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:20:38,075 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:20:38,075 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:20:38,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:20:38,075 INFO L82 PathProgramCache]: Analyzing trace with hash 597505696, now seen corresponding path program 29 times [2021-06-12 22:20:38,075 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:20:38,075 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864395892] [2021-06-12 22:20:38,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:20:38,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:20:38,344 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:20:38,345 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:20:38,345 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864395892] [2021-06-12 22:20:38,345 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1864395892] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:20:38,345 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1238825133] [2021-06-12 22:20:38,345 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:20:38,391 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:20:38,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:20:38,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 22:20:38,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:20:38,695 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:20:38,696 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1238825133] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:20:38,696 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:20:38,696 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 23 [2021-06-12 22:20:38,696 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560213996] [2021-06-12 22:20:38,696 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 22:20:38,696 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:20:38,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 22:20:38,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=473, Unknown=0, NotChecked=0, Total=552 [2021-06-12 22:20:38,697 INFO L87 Difference]: Start difference. First operand 1730 states and 5060 transitions. Second operand has 24 states, 24 states have (on average 2.625) internal successors, (63), 23 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:20:40,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:20:40,106 INFO L93 Difference]: Finished difference Result 3089 states and 8805 transitions. [2021-06-12 22:20:40,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-12 22:20:40,106 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.625) internal successors, (63), 23 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 22:20:40,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:20:40,110 INFO L225 Difference]: With dead ends: 3089 [2021-06-12 22:20:40,110 INFO L226 Difference]: Without dead ends: 3074 [2021-06-12 22:20:40,111 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 633 ImplicationChecksByTransitivity, 1230.2ms TimeCoverageRelationStatistics Valid=301, Invalid=2149, Unknown=0, NotChecked=0, Total=2450 [2021-06-12 22:20:40,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3074 states. [2021-06-12 22:20:40,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3074 to 1710. [2021-06-12 22:20:40,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1710 states, 1709 states have (on average 2.925687536571094) internal successors, (5000), 1709 states have internal predecessors, (5000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:20:40,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1710 states to 1710 states and 5000 transitions. [2021-06-12 22:20:40,149 INFO L78 Accepts]: Start accepts. Automaton has 1710 states and 5000 transitions. Word has length 33 [2021-06-12 22:20:40,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:20:40,149 INFO L482 AbstractCegarLoop]: Abstraction has 1710 states and 5000 transitions. [2021-06-12 22:20:40,150 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.625) internal successors, (63), 23 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:20:40,150 INFO L276 IsEmpty]: Start isEmpty. Operand 1710 states and 5000 transitions. [2021-06-12 22:20:40,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 22:20:40,152 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:20:40,152 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:20:40,354 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-06-12 22:20:40,354 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:20:40,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:20:40,354 INFO L82 PathProgramCache]: Analyzing trace with hash -823668890, now seen corresponding path program 30 times [2021-06-12 22:20:40,354 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:20:40,354 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825275787] [2021-06-12 22:20:40,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:20:40,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:20:40,576 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:20:40,576 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:20:40,576 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825275787] [2021-06-12 22:20:40,577 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [825275787] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:20:40,577 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1788268924] [2021-06-12 22:20:40,577 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:20:40,612 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-12 22:20:40,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:20:40,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 22:20:40,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:20:40,782 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-12 22:20:40,783 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:20:40,790 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:20:40,791 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:20:40,791 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:23 [2021-06-12 22:20:40,912 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:20:40,912 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1788268924] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:20:40,912 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:20:40,912 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 24 [2021-06-12 22:20:40,913 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077709654] [2021-06-12 22:20:40,913 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 22:20:40,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:20:40,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 22:20:40,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2021-06-12 22:20:40,913 INFO L87 Difference]: Start difference. First operand 1710 states and 5000 transitions. Second operand has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:20:42,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:20:42,391 INFO L93 Difference]: Finished difference Result 3178 states and 9047 transitions. [2021-06-12 22:20:42,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-12 22:20:42,392 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 22:20:42,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:20:42,395 INFO L225 Difference]: With dead ends: 3178 [2021-06-12 22:20:42,395 INFO L226 Difference]: Without dead ends: 3163 [2021-06-12 22:20:42,396 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 589 ImplicationChecksByTransitivity, 1218.2ms TimeCoverageRelationStatistics Valid=286, Invalid=2164, Unknown=0, NotChecked=0, Total=2450 [2021-06-12 22:20:42,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3163 states. [2021-06-12 22:20:42,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3163 to 1731. [2021-06-12 22:20:42,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1731 states, 1730 states have (on average 2.921387283236994) internal successors, (5054), 1730 states have internal predecessors, (5054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:20:42,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1731 states to 1731 states and 5054 transitions. [2021-06-12 22:20:42,426 INFO L78 Accepts]: Start accepts. Automaton has 1731 states and 5054 transitions. Word has length 33 [2021-06-12 22:20:42,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:20:42,426 INFO L482 AbstractCegarLoop]: Abstraction has 1731 states and 5054 transitions. [2021-06-12 22:20:42,426 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:20:42,426 INFO L276 IsEmpty]: Start isEmpty. Operand 1731 states and 5054 transitions. [2021-06-12 22:20:42,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 22:20:42,429 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:20:42,429 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:20:42,644 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:20:42,645 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:20:42,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:20:42,645 INFO L82 PathProgramCache]: Analyzing trace with hash 1348229926, now seen corresponding path program 31 times [2021-06-12 22:20:42,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:20:42,645 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533503346] [2021-06-12 22:20:42,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:20:42,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:20:42,905 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:20:42,905 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:20:42,905 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533503346] [2021-06-12 22:20:42,905 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [533503346] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:20:42,905 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [264013390] [2021-06-12 22:20:42,905 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:20:42,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:20:42,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 22:20:42,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:20:43,240 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:20:43,240 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [264013390] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:20:43,241 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:20:43,241 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 23 [2021-06-12 22:20:43,241 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233211338] [2021-06-12 22:20:43,241 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 22:20:43,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:20:43,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 22:20:43,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=473, Unknown=0, NotChecked=0, Total=552 [2021-06-12 22:20:43,242 INFO L87 Difference]: Start difference. First operand 1731 states and 5054 transitions. Second operand has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 23 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:20:44,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:20:44,860 INFO L93 Difference]: Finished difference Result 4067 states and 11353 transitions. [2021-06-12 22:20:44,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-12 22:20:44,860 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 23 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 22:20:44,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:20:44,865 INFO L225 Difference]: With dead ends: 4067 [2021-06-12 22:20:44,865 INFO L226 Difference]: Without dead ends: 4037 [2021-06-12 22:20:44,865 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 774 ImplicationChecksByTransitivity, 1444.3ms TimeCoverageRelationStatistics Valid=366, Invalid=2604, Unknown=0, NotChecked=0, Total=2970 [2021-06-12 22:20:44,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4037 states. [2021-06-12 22:20:44,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4037 to 1768. [2021-06-12 22:20:44,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1768 states, 1767 states have (on average 2.9134125636672326) internal successors, (5148), 1767 states have internal predecessors, (5148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:20:44,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1768 states to 1768 states and 5148 transitions. [2021-06-12 22:20:44,890 INFO L78 Accepts]: Start accepts. Automaton has 1768 states and 5148 transitions. Word has length 33 [2021-06-12 22:20:44,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:20:44,890 INFO L482 AbstractCegarLoop]: Abstraction has 1768 states and 5148 transitions. [2021-06-12 22:20:44,890 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 23 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:20:44,890 INFO L276 IsEmpty]: Start isEmpty. Operand 1768 states and 5148 transitions. [2021-06-12 22:20:44,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 22:20:44,892 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:20:44,892 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:20:45,092 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-06-12 22:20:45,093 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:20:45,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:20:45,093 INFO L82 PathProgramCache]: Analyzing trace with hash 1818150758, now seen corresponding path program 32 times [2021-06-12 22:20:45,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:20:45,093 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564751313] [2021-06-12 22:20:45,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:20:45,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:20:45,353 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:20:45,354 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:20:45,354 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564751313] [2021-06-12 22:20:45,354 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1564751313] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:20:45,354 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [712329837] [2021-06-12 22:20:45,354 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:20:45,383 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:20:45,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:20:45,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 22:20:45,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:20:45,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-12 22:20:45,572 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:20:45,579 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:20:45,580 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:20:45,580 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:21 [2021-06-12 22:20:45,690 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:20:45,690 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [712329837] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:20:45,690 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:20:45,690 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 24 [2021-06-12 22:20:45,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302891175] [2021-06-12 22:20:45,690 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 22:20:45,690 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:20:45,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 22:20:45,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=534, Unknown=0, NotChecked=0, Total=600 [2021-06-12 22:20:45,691 INFO L87 Difference]: Start difference. First operand 1768 states and 5148 transitions. Second operand has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:20:47,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:20:47,253 INFO L93 Difference]: Finished difference Result 3380 states and 9565 transitions. [2021-06-12 22:20:47,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-12 22:20:47,254 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 22:20:47,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:20:47,258 INFO L225 Difference]: With dead ends: 3380 [2021-06-12 22:20:47,258 INFO L226 Difference]: Without dead ends: 3365 [2021-06-12 22:20:47,258 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 698 ImplicationChecksByTransitivity, 1351.4ms TimeCoverageRelationStatistics Valid=306, Invalid=2450, Unknown=0, NotChecked=0, Total=2756 [2021-06-12 22:20:47,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3365 states. [2021-06-12 22:20:47,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3365 to 1852. [2021-06-12 22:20:47,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1852 states, 1851 states have (on average 2.902215018908698) internal successors, (5372), 1851 states have internal predecessors, (5372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:20:47,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1852 states to 1852 states and 5372 transitions. [2021-06-12 22:20:47,283 INFO L78 Accepts]: Start accepts. Automaton has 1852 states and 5372 transitions. Word has length 33 [2021-06-12 22:20:47,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:20:47,283 INFO L482 AbstractCegarLoop]: Abstraction has 1852 states and 5372 transitions. [2021-06-12 22:20:47,283 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:20:47,283 INFO L276 IsEmpty]: Start isEmpty. Operand 1852 states and 5372 transitions. [2021-06-12 22:20:47,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 22:20:47,285 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:20:47,285 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:20:47,486 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-06-12 22:20:47,486 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:20:47,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:20:47,486 INFO L82 PathProgramCache]: Analyzing trace with hash 1975675694, now seen corresponding path program 33 times [2021-06-12 22:20:47,486 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:20:47,486 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346001219] [2021-06-12 22:20:47,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:20:47,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:20:47,801 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:20:47,801 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:20:47,801 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346001219] [2021-06-12 22:20:47,801 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346001219] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:20:47,801 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1701000075] [2021-06-12 22:20:47,801 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:20:47,846 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 22:20:47,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:20:47,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 22:20:47,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:20:47,990 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-12 22:20:47,991 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:20:47,999 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:20:48,000 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:20:48,000 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:21 [2021-06-12 22:20:48,189 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:20:48,189 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1701000075] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:20:48,189 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:20:48,189 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 24 [2021-06-12 22:20:48,189 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809551910] [2021-06-12 22:20:48,190 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 22:20:48,190 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:20:48,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 22:20:48,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=540, Unknown=0, NotChecked=0, Total=600 [2021-06-12 22:20:48,192 INFO L87 Difference]: Start difference. First operand 1852 states and 5372 transitions. Second operand has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:20:50,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:20:50,550 INFO L93 Difference]: Finished difference Result 3776 states and 10567 transitions. [2021-06-12 22:20:50,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-12 22:20:50,550 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 22:20:50,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:20:50,554 INFO L225 Difference]: With dead ends: 3776 [2021-06-12 22:20:50,554 INFO L226 Difference]: Without dead ends: 3746 [2021-06-12 22:20:50,555 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 934 ImplicationChecksByTransitivity, 2057.9ms TimeCoverageRelationStatistics Valid=373, Invalid=3287, Unknown=0, NotChecked=0, Total=3660 [2021-06-12 22:20:50,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3746 states. [2021-06-12 22:20:50,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3746 to 1915. [2021-06-12 22:20:50,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1915 states, 1914 states have (on average 2.9054336468129573) internal successors, (5561), 1914 states have internal predecessors, (5561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:20:50,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1915 states to 1915 states and 5561 transitions. [2021-06-12 22:20:50,579 INFO L78 Accepts]: Start accepts. Automaton has 1915 states and 5561 transitions. Word has length 33 [2021-06-12 22:20:50,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:20:50,579 INFO L482 AbstractCegarLoop]: Abstraction has 1915 states and 5561 transitions. [2021-06-12 22:20:50,580 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:20:50,580 INFO L276 IsEmpty]: Start isEmpty. Operand 1915 states and 5561 transitions. [2021-06-12 22:20:50,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 22:20:50,582 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:20:50,582 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:20:50,784 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-06-12 22:20:50,784 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:20:50,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:20:50,784 INFO L82 PathProgramCache]: Analyzing trace with hash 1746916850, now seen corresponding path program 34 times [2021-06-12 22:20:50,784 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:20:50,784 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646739000] [2021-06-12 22:20:50,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:20:50,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:20:51,061 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:20:51,061 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:20:51,061 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646739000] [2021-06-12 22:20:51,061 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [646739000] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:20:51,061 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [826899129] [2021-06-12 22:20:51,061 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:20:51,089 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:20:51,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:20:51,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 22:20:51,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:20:51,333 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:20:51,334 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [826899129] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:20:51,334 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:20:51,334 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 24 [2021-06-12 22:20:51,334 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779305593] [2021-06-12 22:20:51,334 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 22:20:51,334 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:20:51,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 22:20:51,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=527, Unknown=0, NotChecked=0, Total=600 [2021-06-12 22:20:51,335 INFO L87 Difference]: Start difference. First operand 1915 states and 5561 transitions. Second operand has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:20:52,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:20:52,665 INFO L93 Difference]: Finished difference Result 3286 states and 9167 transitions. [2021-06-12 22:20:52,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-12 22:20:52,665 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 22:20:52,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:20:52,669 INFO L225 Difference]: With dead ends: 3286 [2021-06-12 22:20:52,669 INFO L226 Difference]: Without dead ends: 3256 [2021-06-12 22:20:52,669 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 440 ImplicationChecksByTransitivity, 1099.9ms TimeCoverageRelationStatistics Valid=222, Invalid=1670, Unknown=0, NotChecked=0, Total=1892 [2021-06-12 22:20:52,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3256 states. [2021-06-12 22:20:52,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3256 to 1894. [2021-06-12 22:20:52,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1894 states, 1893 states have (on average 2.8969889064976226) internal successors, (5484), 1893 states have internal predecessors, (5484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:20:52,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1894 states to 1894 states and 5484 transitions. [2021-06-12 22:20:52,693 INFO L78 Accepts]: Start accepts. Automaton has 1894 states and 5484 transitions. Word has length 33 [2021-06-12 22:20:52,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:20:52,693 INFO L482 AbstractCegarLoop]: Abstraction has 1894 states and 5484 transitions. [2021-06-12 22:20:52,693 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:20:52,693 INFO L276 IsEmpty]: Start isEmpty. Operand 1894 states and 5484 transitions. [2021-06-12 22:20:52,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 22:20:52,695 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:20:52,696 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:20:52,900 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-06-12 22:20:52,901 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:20:52,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:20:52,901 INFO L82 PathProgramCache]: Analyzing trace with hash 800185050, now seen corresponding path program 35 times [2021-06-12 22:20:52,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:20:52,901 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255757285] [2021-06-12 22:20:52,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:20:52,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:20:53,208 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:20:53,220 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:20:53,220 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255757285] [2021-06-12 22:20:53,220 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1255757285] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:20:53,220 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1140962] [2021-06-12 22:20:53,220 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:20:53,257 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:20:53,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:20:53,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 22:20:53,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:20:53,536 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:20:53,537 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1140962] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:20:53,537 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:20:53,537 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 24 [2021-06-12 22:20:53,537 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070622549] [2021-06-12 22:20:53,538 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 22:20:53,538 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:20:53,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 22:20:53,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2021-06-12 22:20:53,539 INFO L87 Difference]: Start difference. First operand 1894 states and 5484 transitions. Second operand has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:20:55,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:20:55,523 INFO L93 Difference]: Finished difference Result 3610 states and 10178 transitions. [2021-06-12 22:20:55,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-12 22:20:55,524 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 22:20:55,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:20:55,528 INFO L225 Difference]: With dead ends: 3610 [2021-06-12 22:20:55,528 INFO L226 Difference]: Without dead ends: 3580 [2021-06-12 22:20:55,528 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 878 ImplicationChecksByTransitivity, 1671.7ms TimeCoverageRelationStatistics Valid=389, Invalid=2917, Unknown=0, NotChecked=0, Total=3306 [2021-06-12 22:20:55,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3580 states. [2021-06-12 22:20:55,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3580 to 1873. [2021-06-12 22:20:55,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1873 states, 1872 states have (on average 2.8995726495726495) internal successors, (5428), 1872 states have internal predecessors, (5428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:20:55,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1873 states to 1873 states and 5428 transitions. [2021-06-12 22:20:55,553 INFO L78 Accepts]: Start accepts. Automaton has 1873 states and 5428 transitions. Word has length 33 [2021-06-12 22:20:55,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:20:55,553 INFO L482 AbstractCegarLoop]: Abstraction has 1873 states and 5428 transitions. [2021-06-12 22:20:55,553 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:20:55,553 INFO L276 IsEmpty]: Start isEmpty. Operand 1873 states and 5428 transitions. [2021-06-12 22:20:55,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 22:20:55,556 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:20:55,556 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:20:55,778 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-06-12 22:20:55,778 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:20:55,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:20:55,778 INFO L82 PathProgramCache]: Analyzing trace with hash 645747532, now seen corresponding path program 36 times [2021-06-12 22:20:55,778 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:20:55,778 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484862894] [2021-06-12 22:20:55,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:20:55,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:20:56,120 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:20:56,120 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:20:56,120 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484862894] [2021-06-12 22:20:56,120 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484862894] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:20:56,120 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2135505757] [2021-06-12 22:20:56,120 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:20:56,156 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-12 22:20:56,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:20:56,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 22:20:56,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:20:56,296 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-12 22:20:56,297 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:20:56,304 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:20:56,305 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:20:56,305 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:23 [2021-06-12 22:20:56,446 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:20:56,446 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2135505757] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:20:56,446 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:20:56,446 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 24 [2021-06-12 22:20:56,447 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346463959] [2021-06-12 22:20:56,447 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 22:20:56,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:20:56,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 22:20:56,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=540, Unknown=0, NotChecked=0, Total=600 [2021-06-12 22:20:56,447 INFO L87 Difference]: Start difference. First operand 1873 states and 5428 transitions. Second operand has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:20:58,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:20:58,479 INFO L93 Difference]: Finished difference Result 3372 states and 9542 transitions. [2021-06-12 22:20:58,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-12 22:20:58,479 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 22:20:58,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:20:58,483 INFO L225 Difference]: With dead ends: 3372 [2021-06-12 22:20:58,483 INFO L226 Difference]: Without dead ends: 3342 [2021-06-12 22:20:58,483 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 779 ImplicationChecksByTransitivity, 1670.1ms TimeCoverageRelationStatistics Valid=333, Invalid=2859, Unknown=0, NotChecked=0, Total=3192 [2021-06-12 22:20:58,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3342 states. [2021-06-12 22:20:58,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3342 to 1768. [2021-06-12 22:20:58,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1768 states, 1767 states have (on average 2.9134125636672326) internal successors, (5148), 1767 states have internal predecessors, (5148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:20:58,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1768 states to 1768 states and 5148 transitions. [2021-06-12 22:20:58,504 INFO L78 Accepts]: Start accepts. Automaton has 1768 states and 5148 transitions. Word has length 33 [2021-06-12 22:20:58,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:20:58,505 INFO L482 AbstractCegarLoop]: Abstraction has 1768 states and 5148 transitions. [2021-06-12 22:20:58,505 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:20:58,505 INFO L276 IsEmpty]: Start isEmpty. Operand 1768 states and 5148 transitions. [2021-06-12 22:20:58,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 22:20:58,507 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:20:58,507 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:20:58,707 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-06-12 22:20:58,707 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:20:58,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:20:58,708 INFO L82 PathProgramCache]: Analyzing trace with hash -1942407448, now seen corresponding path program 37 times [2021-06-12 22:20:58,708 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:20:58,708 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512131371] [2021-06-12 22:20:58,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:20:58,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:20:58,885 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:20:58,885 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:20:58,885 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512131371] [2021-06-12 22:20:58,885 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1512131371] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:20:58,885 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [828529736] [2021-06-12 22:20:58,885 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:20:58,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:20:58,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 22:20:58,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:20:59,161 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:20:59,161 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [828529736] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:20:59,161 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:20:59,161 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-12 22:20:59,161 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075065362] [2021-06-12 22:20:59,161 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 22:20:59,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:20:59,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 22:20:59,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-06-12 22:20:59,162 INFO L87 Difference]: Start difference. First operand 1768 states and 5148 transitions. Second operand has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:20:59,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:20:59,658 INFO L93 Difference]: Finished difference Result 2915 states and 8366 transitions. [2021-06-12 22:20:59,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 22:20:59,658 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 22:20:59,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:20:59,661 INFO L225 Difference]: With dead ends: 2915 [2021-06-12 22:20:59,661 INFO L226 Difference]: Without dead ends: 2900 [2021-06-12 22:20:59,661 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 587.6ms TimeCoverageRelationStatistics Valid=122, Invalid=580, Unknown=0, NotChecked=0, Total=702 [2021-06-12 22:20:59,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2900 states. [2021-06-12 22:20:59,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2900 to 1844. [2021-06-12 22:20:59,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1844 states, 1843 states have (on average 2.921323928377645) internal successors, (5384), 1843 states have internal predecessors, (5384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:20:59,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1844 states to 1844 states and 5384 transitions. [2021-06-12 22:20:59,682 INFO L78 Accepts]: Start accepts. Automaton has 1844 states and 5384 transitions. Word has length 33 [2021-06-12 22:20:59,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:20:59,683 INFO L482 AbstractCegarLoop]: Abstraction has 1844 states and 5384 transitions. [2021-06-12 22:20:59,683 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:20:59,683 INFO L276 IsEmpty]: Start isEmpty. Operand 1844 states and 5384 transitions. [2021-06-12 22:20:59,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 22:20:59,685 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:20:59,685 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:20:59,885 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-06-12 22:20:59,885 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:20:59,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:20:59,885 INFO L82 PathProgramCache]: Analyzing trace with hash -1834957080, now seen corresponding path program 38 times [2021-06-12 22:20:59,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:20:59,886 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089099140] [2021-06-12 22:20:59,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:20:59,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:21:00,042 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:21:00,043 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:21:00,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089099140] [2021-06-12 22:21:00,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089099140] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:21:00,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [490125061] [2021-06-12 22:21:00,043 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:21:00,071 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:21:00,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:21:00,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 22:21:00,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:21:00,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-12 22:21:00,230 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:21:00,238 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:21:00,239 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:21:00,239 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:21 [2021-06-12 22:21:00,370 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:21:00,370 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [490125061] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:21:00,370 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:21:00,370 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-06-12 22:21:00,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908683819] [2021-06-12 22:21:00,371 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 22:21:00,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:21:00,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 22:21:00,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2021-06-12 22:21:00,371 INFO L87 Difference]: Start difference. First operand 1844 states and 5384 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:01,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:21:01,155 INFO L93 Difference]: Finished difference Result 2512 states and 7162 transitions. [2021-06-12 22:21:01,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-12 22:21:01,156 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 22:21:01,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:21:01,159 INFO L225 Difference]: With dead ends: 2512 [2021-06-12 22:21:01,159 INFO L226 Difference]: Without dead ends: 2497 [2021-06-12 22:21:01,159 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 793.5ms TimeCoverageRelationStatistics Valid=185, Invalid=937, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 22:21:01,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2497 states. [2021-06-12 22:21:01,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2497 to 1856. [2021-06-12 22:21:01,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1856 states, 1855 states have (on average 2.923989218328841) internal successors, (5424), 1855 states have internal predecessors, (5424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:01,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1856 states to 1856 states and 5424 transitions. [2021-06-12 22:21:01,182 INFO L78 Accepts]: Start accepts. Automaton has 1856 states and 5424 transitions. Word has length 33 [2021-06-12 22:21:01,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:21:01,182 INFO L482 AbstractCegarLoop]: Abstraction has 1856 states and 5424 transitions. [2021-06-12 22:21:01,182 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:01,182 INFO L276 IsEmpty]: Start isEmpty. Operand 1856 states and 5424 transitions. [2021-06-12 22:21:01,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 22:21:01,184 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:21:01,184 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:21:01,384 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:21:01,385 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:21:01,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:21:01,385 INFO L82 PathProgramCache]: Analyzing trace with hash 1583827752, now seen corresponding path program 39 times [2021-06-12 22:21:01,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:21:01,385 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12552685] [2021-06-12 22:21:01,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:21:01,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:21:01,576 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:21:01,576 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:21:01,577 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12552685] [2021-06-12 22:21:01,577 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [12552685] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:21:01,577 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1506418312] [2021-06-12 22:21:01,577 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:21:01,614 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 22:21:01,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:21:01,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 22:21:01,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:21:01,753 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-12 22:21:01,754 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:21:01,762 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:21:01,763 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:21:01,763 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:21 [2021-06-12 22:21:01,925 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:21:01,926 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1506418312] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:21:01,926 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:21:01,926 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-06-12 22:21:01,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691635030] [2021-06-12 22:21:01,926 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 22:21:01,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:21:01,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 22:21:01,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2021-06-12 22:21:01,927 INFO L87 Difference]: Start difference. First operand 1856 states and 5424 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:02,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:21:02,467 INFO L93 Difference]: Finished difference Result 2789 states and 8006 transitions. [2021-06-12 22:21:02,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 22:21:02,467 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 22:21:02,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:21:02,470 INFO L225 Difference]: With dead ends: 2789 [2021-06-12 22:21:02,470 INFO L226 Difference]: Without dead ends: 2770 [2021-06-12 22:21:02,470 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 648.1ms TimeCoverageRelationStatistics Valid=146, Invalid=724, Unknown=0, NotChecked=0, Total=870 [2021-06-12 22:21:02,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2770 states. [2021-06-12 22:21:02,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2770 to 1852. [2021-06-12 22:21:02,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1852 states, 1851 states have (on average 2.921663965424095) internal successors, (5408), 1851 states have internal predecessors, (5408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:02,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1852 states to 1852 states and 5408 transitions. [2021-06-12 22:21:02,490 INFO L78 Accepts]: Start accepts. Automaton has 1852 states and 5408 transitions. Word has length 33 [2021-06-12 22:21:02,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:21:02,490 INFO L482 AbstractCegarLoop]: Abstraction has 1852 states and 5408 transitions. [2021-06-12 22:21:02,490 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:02,490 INFO L276 IsEmpty]: Start isEmpty. Operand 1852 states and 5408 transitions. [2021-06-12 22:21:02,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 22:21:02,492 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:21:02,492 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:21:02,692 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:21:02,693 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:21:02,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:21:02,693 INFO L82 PathProgramCache]: Analyzing trace with hash 1725542892, now seen corresponding path program 40 times [2021-06-12 22:21:02,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:21:02,693 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331899785] [2021-06-12 22:21:02,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:21:02,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:21:02,843 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:21:02,844 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:21:02,844 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331899785] [2021-06-12 22:21:02,844 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331899785] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:21:02,844 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1268981532] [2021-06-12 22:21:02,844 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:21:02,872 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:21:02,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:21:02,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 22:21:02,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:21:03,076 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:21:03,076 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1268981532] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:21:03,077 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:21:03,077 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-12 22:21:03,077 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743298954] [2021-06-12 22:21:03,077 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 22:21:03,077 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:21:03,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 22:21:03,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-06-12 22:21:03,078 INFO L87 Difference]: Start difference. First operand 1852 states and 5408 transitions. Second operand has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:03,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:21:03,758 INFO L93 Difference]: Finished difference Result 3085 states and 8828 transitions. [2021-06-12 22:21:03,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-12 22:21:03,759 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 22:21:03,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:21:03,762 INFO L225 Difference]: With dead ends: 3085 [2021-06-12 22:21:03,762 INFO L226 Difference]: Without dead ends: 3070 [2021-06-12 22:21:03,762 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 598.2ms TimeCoverageRelationStatistics Valid=142, Invalid=728, Unknown=0, NotChecked=0, Total=870 [2021-06-12 22:21:03,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3070 states. [2021-06-12 22:21:03,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3070 to 1867. [2021-06-12 22:21:03,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1867 states, 1866 states have (on average 2.9217577706323685) internal successors, (5452), 1866 states have internal predecessors, (5452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:03,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1867 states to 1867 states and 5452 transitions. [2021-06-12 22:21:03,783 INFO L78 Accepts]: Start accepts. Automaton has 1867 states and 5452 transitions. Word has length 33 [2021-06-12 22:21:03,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:21:03,783 INFO L482 AbstractCegarLoop]: Abstraction has 1867 states and 5452 transitions. [2021-06-12 22:21:03,783 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:03,783 INFO L276 IsEmpty]: Start isEmpty. Operand 1867 states and 5452 transitions. [2021-06-12 22:21:03,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 22:21:03,785 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:21:03,785 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:21:03,986 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:21:03,986 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:21:03,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:21:03,986 INFO L82 PathProgramCache]: Analyzing trace with hash 442395432, now seen corresponding path program 41 times [2021-06-12 22:21:03,986 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:21:03,986 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576296711] [2021-06-12 22:21:03,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:21:03,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:21:04,153 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:21:04,153 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:21:04,154 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576296711] [2021-06-12 22:21:04,155 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1576296711] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:21:04,155 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [236735376] [2021-06-12 22:21:04,155 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:21:04,204 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:21:04,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:21:04,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 22:21:04,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:21:04,430 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:21:04,430 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [236735376] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:21:04,430 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:21:04,430 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-12 22:21:04,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357128998] [2021-06-12 22:21:04,430 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 22:21:04,431 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:21:04,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 22:21:04,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-06-12 22:21:04,431 INFO L87 Difference]: Start difference. First operand 1867 states and 5452 transitions. Second operand has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:05,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:21:05,050 INFO L93 Difference]: Finished difference Result 3084 states and 8813 transitions. [2021-06-12 22:21:05,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-12 22:21:05,050 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 22:21:05,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:21:05,053 INFO L225 Difference]: With dead ends: 3084 [2021-06-12 22:21:05,053 INFO L226 Difference]: Without dead ends: 3069 [2021-06-12 22:21:05,053 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 609.7ms TimeCoverageRelationStatistics Valid=132, Invalid=680, Unknown=0, NotChecked=0, Total=812 [2021-06-12 22:21:05,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3069 states. [2021-06-12 22:21:05,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3069 to 1847. [2021-06-12 22:21:05,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1847 states, 1846 states have (on average 2.9209100758396533) internal successors, (5392), 1846 states have internal predecessors, (5392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:05,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1847 states to 1847 states and 5392 transitions. [2021-06-12 22:21:05,076 INFO L78 Accepts]: Start accepts. Automaton has 1847 states and 5392 transitions. Word has length 33 [2021-06-12 22:21:05,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:21:05,076 INFO L482 AbstractCegarLoop]: Abstraction has 1847 states and 5392 transitions. [2021-06-12 22:21:05,076 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:05,077 INFO L276 IsEmpty]: Start isEmpty. Operand 1847 states and 5392 transitions. [2021-06-12 22:21:05,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 22:21:05,078 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:21:05,078 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:21:05,278 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-06-12 22:21:05,279 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:21:05,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:21:05,279 INFO L82 PathProgramCache]: Analyzing trace with hash 664274664, now seen corresponding path program 42 times [2021-06-12 22:21:05,279 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:21:05,279 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740510980] [2021-06-12 22:21:05,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:21:05,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:21:05,453 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:21:05,453 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:21:05,453 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740510980] [2021-06-12 22:21:05,453 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740510980] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:21:05,453 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1215615828] [2021-06-12 22:21:05,454 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:21:05,490 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-12 22:21:05,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:21:05,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 22:21:05,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:21:05,754 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:21:05,755 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1215615828] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:21:05,755 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:21:05,755 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-06-12 22:21:05,755 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811551652] [2021-06-12 22:21:05,755 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 22:21:05,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:21:05,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 22:21:05,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-06-12 22:21:05,755 INFO L87 Difference]: Start difference. First operand 1847 states and 5392 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:06,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:21:06,217 INFO L93 Difference]: Finished difference Result 2961 states and 8504 transitions. [2021-06-12 22:21:06,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 22:21:06,217 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 22:21:06,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:21:06,221 INFO L225 Difference]: With dead ends: 2961 [2021-06-12 22:21:06,221 INFO L226 Difference]: Without dead ends: 2946 [2021-06-12 22:21:06,221 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 575.6ms TimeCoverageRelationStatistics Valid=147, Invalid=723, Unknown=0, NotChecked=0, Total=870 [2021-06-12 22:21:06,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2946 states. [2021-06-12 22:21:06,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2946 to 1931. [2021-06-12 22:21:06,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1931 states, 1930 states have (on average 2.9098445595854923) internal successors, (5616), 1930 states have internal predecessors, (5616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:06,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1931 states to 1931 states and 5616 transitions. [2021-06-12 22:21:06,242 INFO L78 Accepts]: Start accepts. Automaton has 1931 states and 5616 transitions. Word has length 33 [2021-06-12 22:21:06,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:21:06,253 INFO L482 AbstractCegarLoop]: Abstraction has 1931 states and 5616 transitions. [2021-06-12 22:21:06,253 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:06,253 INFO L276 IsEmpty]: Start isEmpty. Operand 1931 states and 5616 transitions. [2021-06-12 22:21:06,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 22:21:06,255 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:21:06,255 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:21:06,455 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:21:06,456 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:21:06,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:21:06,456 INFO L82 PathProgramCache]: Analyzing trace with hash 690343540, now seen corresponding path program 43 times [2021-06-12 22:21:06,456 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:21:06,456 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979732729] [2021-06-12 22:21:06,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:21:06,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:21:06,629 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:21:06,629 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:21:06,630 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979732729] [2021-06-12 22:21:06,630 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [979732729] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:21:06,630 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1877839498] [2021-06-12 22:21:06,630 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:21:06,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:21:06,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 22:21:06,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:21:06,886 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:21:06,886 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1877839498] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:21:06,887 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:21:06,887 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-12 22:21:06,887 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583988248] [2021-06-12 22:21:06,887 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 22:21:06,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:21:06,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 22:21:06,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-06-12 22:21:06,888 INFO L87 Difference]: Start difference. First operand 1931 states and 5616 transitions. Second operand has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:07,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:21:07,713 INFO L93 Difference]: Finished difference Result 2621 states and 7460 transitions. [2021-06-12 22:21:07,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 22:21:07,713 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 22:21:07,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:21:07,716 INFO L225 Difference]: With dead ends: 2621 [2021-06-12 22:21:07,716 INFO L226 Difference]: Without dead ends: 2606 [2021-06-12 22:21:07,716 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 835.7ms TimeCoverageRelationStatistics Valid=147, Invalid=723, Unknown=0, NotChecked=0, Total=870 [2021-06-12 22:21:07,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2606 states. [2021-06-12 22:21:07,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2606 to 1994. [2021-06-12 22:21:07,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1994 states, 1993 states have (on average 2.912694430506774) internal successors, (5805), 1993 states have internal predecessors, (5805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:07,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1994 states to 1994 states and 5805 transitions. [2021-06-12 22:21:07,736 INFO L78 Accepts]: Start accepts. Automaton has 1994 states and 5805 transitions. Word has length 33 [2021-06-12 22:21:07,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:21:07,736 INFO L482 AbstractCegarLoop]: Abstraction has 1994 states and 5805 transitions. [2021-06-12 22:21:07,736 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:07,737 INFO L276 IsEmpty]: Start isEmpty. Operand 1994 states and 5805 transitions. [2021-06-12 22:21:07,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 22:21:07,738 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:21:07,738 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:21:07,939 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:21:07,939 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:21:07,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:21:07,939 INFO L82 PathProgramCache]: Analyzing trace with hash 461584696, now seen corresponding path program 44 times [2021-06-12 22:21:07,939 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:21:07,939 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405828920] [2021-06-12 22:21:07,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:21:07,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:21:08,081 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:21:08,081 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:21:08,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405828920] [2021-06-12 22:21:08,081 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [405828920] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:21:08,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [873051725] [2021-06-12 22:21:08,082 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:21:08,116 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:21:08,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:21:08,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 22:21:08,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:21:08,236 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-12 22:21:08,237 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:21:08,244 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:21:08,246 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:21:08,246 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:19 [2021-06-12 22:21:08,366 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:21:08,367 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [873051725] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:21:08,367 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:21:08,367 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-06-12 22:21:08,367 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590497940] [2021-06-12 22:21:08,367 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 22:21:08,367 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:21:08,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 22:21:08,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2021-06-12 22:21:08,367 INFO L87 Difference]: Start difference. First operand 1994 states and 5805 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:08,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:21:08,855 INFO L93 Difference]: Finished difference Result 2898 states and 8304 transitions. [2021-06-12 22:21:08,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 22:21:08,855 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 22:21:08,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:21:08,858 INFO L225 Difference]: With dead ends: 2898 [2021-06-12 22:21:08,858 INFO L226 Difference]: Without dead ends: 2883 [2021-06-12 22:21:08,859 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 547.6ms TimeCoverageRelationStatistics Valid=146, Invalid=724, Unknown=0, NotChecked=0, Total=870 [2021-06-12 22:21:08,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2883 states. [2021-06-12 22:21:08,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2883 to 1973. [2021-06-12 22:21:08,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1973 states, 1972 states have (on average 2.9046653144016226) internal successors, (5728), 1972 states have internal predecessors, (5728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:08,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1973 states to 1973 states and 5728 transitions. [2021-06-12 22:21:08,895 INFO L78 Accepts]: Start accepts. Automaton has 1973 states and 5728 transitions. Word has length 33 [2021-06-12 22:21:08,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:21:08,895 INFO L482 AbstractCegarLoop]: Abstraction has 1973 states and 5728 transitions. [2021-06-12 22:21:08,895 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:08,895 INFO L276 IsEmpty]: Start isEmpty. Operand 1973 states and 5728 transitions. [2021-06-12 22:21:08,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 22:21:08,897 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:21:08,897 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:21:09,098 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-06-12 22:21:09,098 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:21:09,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:21:09,098 INFO L82 PathProgramCache]: Analyzing trace with hash -485147104, now seen corresponding path program 45 times [2021-06-12 22:21:09,099 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:21:09,099 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236067236] [2021-06-12 22:21:09,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:21:09,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:21:09,273 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:21:09,274 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:21:09,274 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236067236] [2021-06-12 22:21:09,274 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236067236] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:21:09,274 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1081077359] [2021-06-12 22:21:09,274 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:21:09,303 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 22:21:09,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:21:09,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 22:21:09,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:21:09,410 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-12 22:21:09,411 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:21:09,418 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:21:09,418 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:21:09,419 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:19 [2021-06-12 22:21:09,531 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:21:09,531 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1081077359] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:21:09,531 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:21:09,531 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-06-12 22:21:09,532 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971114032] [2021-06-12 22:21:09,532 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 22:21:09,532 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:21:09,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 22:21:09,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-06-12 22:21:09,532 INFO L87 Difference]: Start difference. First operand 1973 states and 5728 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:10,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:21:10,063 INFO L93 Difference]: Finished difference Result 3145 states and 8991 transitions. [2021-06-12 22:21:10,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-12 22:21:10,063 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 22:21:10,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:21:10,067 INFO L225 Difference]: With dead ends: 3145 [2021-06-12 22:21:10,067 INFO L226 Difference]: Without dead ends: 3130 [2021-06-12 22:21:10,067 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 585.4ms TimeCoverageRelationStatistics Valid=169, Invalid=823, Unknown=0, NotChecked=0, Total=992 [2021-06-12 22:21:10,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3130 states. [2021-06-12 22:21:10,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3130 to 1994. [2021-06-12 22:21:10,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1994 states, 1993 states have (on average 2.902157551430005) internal successors, (5784), 1993 states have internal predecessors, (5784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:10,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1994 states to 1994 states and 5784 transitions. [2021-06-12 22:21:10,090 INFO L78 Accepts]: Start accepts. Automaton has 1994 states and 5784 transitions. Word has length 33 [2021-06-12 22:21:10,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:21:10,090 INFO L482 AbstractCegarLoop]: Abstraction has 1994 states and 5784 transitions. [2021-06-12 22:21:10,090 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:10,090 INFO L276 IsEmpty]: Start isEmpty. Operand 1994 states and 5784 transitions. [2021-06-12 22:21:10,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 22:21:10,092 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:21:10,092 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:21:10,292 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-06-12 22:21:10,292 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:21:10,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:21:10,292 INFO L82 PathProgramCache]: Analyzing trace with hash -639584622, now seen corresponding path program 46 times [2021-06-12 22:21:10,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:21:10,293 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665731963] [2021-06-12 22:21:10,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:21:10,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:21:10,467 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:21:10,467 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:21:10,467 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665731963] [2021-06-12 22:21:10,467 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1665731963] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:21:10,467 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [692052195] [2021-06-12 22:21:10,467 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:21:10,509 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:21:10,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:21:10,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 22:21:10,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:21:10,736 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:21:10,736 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [692052195] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:21:10,736 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:21:10,736 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-12 22:21:10,736 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769411273] [2021-06-12 22:21:10,736 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 22:21:10,736 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:21:10,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 22:21:10,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-06-12 22:21:10,737 INFO L87 Difference]: Start difference. First operand 1994 states and 5784 transitions. Second operand has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:11,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:21:11,300 INFO L93 Difference]: Finished difference Result 3024 states and 8672 transitions. [2021-06-12 22:21:11,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 22:21:11,300 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 22:21:11,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:21:11,304 INFO L225 Difference]: With dead ends: 3024 [2021-06-12 22:21:11,304 INFO L226 Difference]: Without dead ends: 3009 [2021-06-12 22:21:11,304 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 566.0ms TimeCoverageRelationStatistics Valid=121, Invalid=581, Unknown=0, NotChecked=0, Total=702 [2021-06-12 22:21:11,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3009 states. [2021-06-12 22:21:11,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3009 to 1889. [2021-06-12 22:21:11,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1889 states, 1888 states have (on average 2.9152542372881354) internal successors, (5504), 1888 states have internal predecessors, (5504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:11,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1889 states to 1889 states and 5504 transitions. [2021-06-12 22:21:11,325 INFO L78 Accepts]: Start accepts. Automaton has 1889 states and 5504 transitions. Word has length 33 [2021-06-12 22:21:11,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:21:11,325 INFO L482 AbstractCegarLoop]: Abstraction has 1889 states and 5504 transitions. [2021-06-12 22:21:11,325 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:11,325 INFO L276 IsEmpty]: Start isEmpty. Operand 1889 states and 5504 transitions. [2021-06-12 22:21:11,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 22:21:11,327 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:21:11,327 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:21:11,529 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-06-12 22:21:11,529 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:21:11,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:21:11,530 INFO L82 PathProgramCache]: Analyzing trace with hash 2131995304, now seen corresponding path program 47 times [2021-06-12 22:21:11,530 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:21:11,530 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080873923] [2021-06-12 22:21:11,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:21:11,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:21:11,681 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:21:11,681 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:21:11,681 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080873923] [2021-06-12 22:21:11,681 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1080873923] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:21:11,681 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [459228909] [2021-06-12 22:21:11,682 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:21:11,711 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:21:11,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:21:11,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 22:21:11,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:21:11,920 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:21:11,920 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [459228909] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:21:11,921 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:21:11,921 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-12 22:21:11,921 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195820265] [2021-06-12 22:21:11,921 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 22:21:11,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:21:11,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 22:21:11,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-06-12 22:21:11,921 INFO L87 Difference]: Start difference. First operand 1889 states and 5504 transitions. Second operand has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:12,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:21:12,732 INFO L93 Difference]: Finished difference Result 2385 states and 6869 transitions. [2021-06-12 22:21:12,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 22:21:12,732 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 22:21:12,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:21:12,735 INFO L225 Difference]: With dead ends: 2385 [2021-06-12 22:21:12,735 INFO L226 Difference]: Without dead ends: 2370 [2021-06-12 22:21:12,735 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 814.4ms TimeCoverageRelationStatistics Valid=164, Invalid=766, Unknown=0, NotChecked=0, Total=930 [2021-06-12 22:21:12,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2370 states. [2021-06-12 22:21:12,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2370 to 1915. [2021-06-12 22:21:12,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1915 states, 1914 states have (on average 2.9231974921630095) internal successors, (5595), 1914 states have internal predecessors, (5595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:12,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1915 states to 1915 states and 5595 transitions. [2021-06-12 22:21:12,763 INFO L78 Accepts]: Start accepts. Automaton has 1915 states and 5595 transitions. Word has length 33 [2021-06-12 22:21:12,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:21:12,763 INFO L482 AbstractCegarLoop]: Abstraction has 1915 states and 5595 transitions. [2021-06-12 22:21:12,763 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:12,763 INFO L276 IsEmpty]: Start isEmpty. Operand 1915 states and 5595 transitions. [2021-06-12 22:21:12,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 22:21:12,765 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:21:12,765 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:21:12,965 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:21:12,965 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:21:12,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:21:12,966 INFO L82 PathProgramCache]: Analyzing trace with hash 1255812840, now seen corresponding path program 48 times [2021-06-12 22:21:12,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:21:12,966 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892811571] [2021-06-12 22:21:12,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:21:12,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:21:13,152 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:21:13,152 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:21:13,152 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892811571] [2021-06-12 22:21:13,152 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [892811571] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:21:13,152 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1778872939] [2021-06-12 22:21:13,152 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:21:13,192 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-12 22:21:13,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:21:13,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 22:21:13,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:21:13,296 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-12 22:21:13,297 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:21:13,304 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:21:13,304 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:21:13,304 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:19 [2021-06-12 22:21:13,479 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:21:13,479 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1778872939] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:21:13,480 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:21:13,480 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-06-12 22:21:13,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747148052] [2021-06-12 22:21:13,480 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 22:21:13,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:21:13,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 22:21:13,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-06-12 22:21:13,480 INFO L87 Difference]: Start difference. First operand 1915 states and 5595 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:14,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:21:14,323 INFO L93 Difference]: Finished difference Result 2413 states and 6928 transitions. [2021-06-12 22:21:14,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 22:21:14,323 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 22:21:14,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:21:14,326 INFO L225 Difference]: With dead ends: 2413 [2021-06-12 22:21:14,326 INFO L226 Difference]: Without dead ends: 2394 [2021-06-12 22:21:14,326 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 882.6ms TimeCoverageRelationStatistics Valid=184, Invalid=938, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 22:21:14,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2394 states. [2021-06-12 22:21:14,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2394 to 1911. [2021-06-12 22:21:14,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1911 states, 1910 states have (on average 2.9209424083769635) internal successors, (5579), 1910 states have internal predecessors, (5579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:14,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1911 states to 1911 states and 5579 transitions. [2021-06-12 22:21:14,345 INFO L78 Accepts]: Start accepts. Automaton has 1911 states and 5579 transitions. Word has length 33 [2021-06-12 22:21:14,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:21:14,345 INFO L482 AbstractCegarLoop]: Abstraction has 1911 states and 5579 transitions. [2021-06-12 22:21:14,346 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:14,346 INFO L276 IsEmpty]: Start isEmpty. Operand 1911 states and 5579 transitions. [2021-06-12 22:21:14,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 22:21:14,347 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:21:14,348 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:21:14,548 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:21:14,548 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:21:14,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:21:14,548 INFO L82 PathProgramCache]: Analyzing trace with hash -1795107096, now seen corresponding path program 49 times [2021-06-12 22:21:14,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:21:14,549 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015104142] [2021-06-12 22:21:14,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:21:14,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:21:14,731 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:21:14,731 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:21:14,731 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015104142] [2021-06-12 22:21:14,731 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1015104142] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:21:14,731 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [792304980] [2021-06-12 22:21:14,731 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:21:14,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:21:14,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 22:21:14,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:21:15,014 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:21:15,014 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [792304980] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:21:15,014 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:21:15,014 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-12 22:21:15,014 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127706460] [2021-06-12 22:21:15,014 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 22:21:15,014 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:21:15,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 22:21:15,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-06-12 22:21:15,015 INFO L87 Difference]: Start difference. First operand 1911 states and 5579 transitions. Second operand has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:15,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:21:15,921 INFO L93 Difference]: Finished difference Result 2450 states and 7029 transitions. [2021-06-12 22:21:15,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 22:21:15,921 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 22:21:15,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:21:15,923 INFO L225 Difference]: With dead ends: 2450 [2021-06-12 22:21:15,924 INFO L226 Difference]: Without dead ends: 2435 [2021-06-12 22:21:15,924 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 893.2ms TimeCoverageRelationStatistics Valid=164, Invalid=766, Unknown=0, NotChecked=0, Total=930 [2021-06-12 22:21:15,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2435 states. [2021-06-12 22:21:15,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2435 to 1932. [2021-06-12 22:21:15,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1932 states, 1931 states have (on average 2.9290523045054377) internal successors, (5656), 1931 states have internal predecessors, (5656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:15,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1932 states to 1932 states and 5656 transitions. [2021-06-12 22:21:15,943 INFO L78 Accepts]: Start accepts. Automaton has 1932 states and 5656 transitions. Word has length 33 [2021-06-12 22:21:15,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:21:15,943 INFO L482 AbstractCegarLoop]: Abstraction has 1932 states and 5656 transitions. [2021-06-12 22:21:15,944 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:15,944 INFO L276 IsEmpty]: Start isEmpty. Operand 1932 states and 5656 transitions. [2021-06-12 22:21:15,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 22:21:15,945 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:21:15,945 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:21:16,146 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:21:16,146 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:21:16,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:21:16,146 INFO L82 PathProgramCache]: Analyzing trace with hash -31437166, now seen corresponding path program 50 times [2021-06-12 22:21:16,146 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:21:16,146 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348308898] [2021-06-12 22:21:16,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:21:16,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:21:16,303 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:21:16,303 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:21:16,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348308898] [2021-06-12 22:21:16,303 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1348308898] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:21:16,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1617790638] [2021-06-12 22:21:16,303 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:21:16,339 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:21:16,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:21:16,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 22:21:16,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:21:16,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-12 22:21:16,440 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:21:16,447 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:21:16,448 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:21:16,448 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:19 [2021-06-12 22:21:16,619 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:21:16,619 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1617790638] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:21:16,619 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:21:16,620 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-06-12 22:21:16,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932819538] [2021-06-12 22:21:16,620 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 22:21:16,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:21:16,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 22:21:16,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-06-12 22:21:16,621 INFO L87 Difference]: Start difference. First operand 1932 states and 5656 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:17,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:21:17,477 INFO L93 Difference]: Finished difference Result 2504 states and 7139 transitions. [2021-06-12 22:21:17,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 22:21:17,477 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 22:21:17,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:21:17,480 INFO L225 Difference]: With dead ends: 2504 [2021-06-12 22:21:17,480 INFO L226 Difference]: Without dead ends: 2489 [2021-06-12 22:21:17,480 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 846.9ms TimeCoverageRelationStatistics Valid=184, Invalid=938, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 22:21:17,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2489 states. [2021-06-12 22:21:17,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2489 to 1911. [2021-06-12 22:21:17,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1911 states, 1910 states have (on average 2.9209424083769635) internal successors, (5579), 1910 states have internal predecessors, (5579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:17,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1911 states to 1911 states and 5579 transitions. [2021-06-12 22:21:17,499 INFO L78 Accepts]: Start accepts. Automaton has 1911 states and 5579 transitions. Word has length 33 [2021-06-12 22:21:17,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:21:17,500 INFO L482 AbstractCegarLoop]: Abstraction has 1911 states and 5579 transitions. [2021-06-12 22:21:17,500 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:17,501 INFO L276 IsEmpty]: Start isEmpty. Operand 1911 states and 5579 transitions. [2021-06-12 22:21:17,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 22:21:17,502 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:21:17,502 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:21:17,703 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:21:17,703 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:21:17,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:21:17,703 INFO L82 PathProgramCache]: Analyzing trace with hash 28859176, now seen corresponding path program 51 times [2021-06-12 22:21:17,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:21:17,704 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105519975] [2021-06-12 22:21:17,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:21:17,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:21:17,833 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:21:17,833 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:21:17,833 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105519975] [2021-06-12 22:21:17,833 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1105519975] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:21:17,833 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1483905603] [2021-06-12 22:21:17,833 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:21:17,870 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 22:21:17,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:21:17,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 22:21:17,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:21:17,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-12 22:21:17,965 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:21:17,971 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:21:17,972 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:21:17,972 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:19 [2021-06-12 22:21:18,115 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:21:18,115 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1483905603] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:21:18,115 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:21:18,115 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-06-12 22:21:18,115 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048861970] [2021-06-12 22:21:18,115 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 22:21:18,115 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:21:18,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 22:21:18,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2021-06-12 22:21:18,116 INFO L87 Difference]: Start difference. First operand 1911 states and 5579 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:18,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:21:18,613 INFO L93 Difference]: Finished difference Result 2538 states and 7369 transitions. [2021-06-12 22:21:18,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 22:21:18,613 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 22:21:18,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:21:18,616 INFO L225 Difference]: With dead ends: 2538 [2021-06-12 22:21:18,616 INFO L226 Difference]: Without dead ends: 2519 [2021-06-12 22:21:18,616 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 493.2ms TimeCoverageRelationStatistics Valid=145, Invalid=667, Unknown=0, NotChecked=0, Total=812 [2021-06-12 22:21:18,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2519 states. [2021-06-12 22:21:18,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2519 to 1933. [2021-06-12 22:21:18,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1933 states, 1932 states have (on average 2.9151138716356106) internal successors, (5632), 1932 states have internal predecessors, (5632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:18,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1933 states to 1933 states and 5632 transitions. [2021-06-12 22:21:18,636 INFO L78 Accepts]: Start accepts. Automaton has 1933 states and 5632 transitions. Word has length 33 [2021-06-12 22:21:18,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:21:18,636 INFO L482 AbstractCegarLoop]: Abstraction has 1933 states and 5632 transitions. [2021-06-12 22:21:18,636 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:18,636 INFO L276 IsEmpty]: Start isEmpty. Operand 1933 states and 5632 transitions. [2021-06-12 22:21:18,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 22:21:18,638 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:21:18,638 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:21:18,838 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2021-06-12 22:21:18,839 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:21:18,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:21:18,839 INFO L82 PathProgramCache]: Analyzing trace with hash -578578584, now seen corresponding path program 52 times [2021-06-12 22:21:18,839 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:21:18,839 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708653930] [2021-06-12 22:21:18,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:21:18,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:21:19,005 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:21:19,006 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:21:19,006 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708653930] [2021-06-12 22:21:19,006 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708653930] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:21:19,006 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1479195347] [2021-06-12 22:21:19,006 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:21:19,042 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:21:19,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:21:19,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 22:21:19,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:21:19,260 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:21:19,260 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1479195347] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:21:19,260 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:21:19,260 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-12 22:21:19,260 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216864985] [2021-06-12 22:21:19,260 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 22:21:19,260 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:21:19,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 22:21:19,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-06-12 22:21:19,261 INFO L87 Difference]: Start difference. First operand 1933 states and 5632 transitions. Second operand has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:19,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:21:19,703 INFO L93 Difference]: Finished difference Result 2564 states and 7420 transitions. [2021-06-12 22:21:19,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 22:21:19,703 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 22:21:19,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:21:19,706 INFO L225 Difference]: With dead ends: 2564 [2021-06-12 22:21:19,706 INFO L226 Difference]: Without dead ends: 2549 [2021-06-12 22:21:19,706 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 542.4ms TimeCoverageRelationStatistics Valid=114, Invalid=536, Unknown=0, NotChecked=0, Total=650 [2021-06-12 22:21:19,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2549 states. [2021-06-12 22:21:19,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2549 to 1900. [2021-06-12 22:21:19,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1900 states, 1899 states have (on average 2.9152185360716167) internal successors, (5536), 1899 states have internal predecessors, (5536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:19,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1900 states to 1900 states and 5536 transitions. [2021-06-12 22:21:19,725 INFO L78 Accepts]: Start accepts. Automaton has 1900 states and 5536 transitions. Word has length 33 [2021-06-12 22:21:19,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:21:19,725 INFO L482 AbstractCegarLoop]: Abstraction has 1900 states and 5536 transitions. [2021-06-12 22:21:19,725 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:19,726 INFO L276 IsEmpty]: Start isEmpty. Operand 1900 states and 5536 transitions. [2021-06-12 22:21:19,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 22:21:19,727 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:21:19,727 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:21:19,928 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:21:19,928 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:21:19,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:21:19,928 INFO L82 PathProgramCache]: Analyzing trace with hash -41415812, now seen corresponding path program 53 times [2021-06-12 22:21:19,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:21:19,928 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133629123] [2021-06-12 22:21:19,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:21:19,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:21:20,088 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:21:20,088 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:21:20,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133629123] [2021-06-12 22:21:20,088 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [133629123] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:21:20,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [174013508] [2021-06-12 22:21:20,088 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:21:20,118 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:21:20,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:21:20,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 22:21:20,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:21:20,323 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:21:20,323 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [174013508] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:21:20,323 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:21:20,323 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-12 22:21:20,323 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909598385] [2021-06-12 22:21:20,323 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 22:21:20,323 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:21:20,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 22:21:20,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-06-12 22:21:20,324 INFO L87 Difference]: Start difference. First operand 1900 states and 5536 transitions. Second operand has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:21,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:21:21,306 INFO L93 Difference]: Finished difference Result 2546 states and 7305 transitions. [2021-06-12 22:21:21,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-12 22:21:21,307 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 22:21:21,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:21:21,309 INFO L225 Difference]: With dead ends: 2546 [2021-06-12 22:21:21,309 INFO L226 Difference]: Without dead ends: 2531 [2021-06-12 22:21:21,310 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 943.3ms TimeCoverageRelationStatistics Valid=195, Invalid=995, Unknown=0, NotChecked=0, Total=1190 [2021-06-12 22:21:21,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2531 states. [2021-06-12 22:21:21,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2531 to 1908. [2021-06-12 22:21:21,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1908 states, 1907 states have (on average 2.91767173571054) internal successors, (5564), 1907 states have internal predecessors, (5564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:21,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1908 states to 1908 states and 5564 transitions. [2021-06-12 22:21:21,335 INFO L78 Accepts]: Start accepts. Automaton has 1908 states and 5564 transitions. Word has length 33 [2021-06-12 22:21:21,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:21:21,335 INFO L482 AbstractCegarLoop]: Abstraction has 1908 states and 5564 transitions. [2021-06-12 22:21:21,335 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:21,336 INFO L276 IsEmpty]: Start isEmpty. Operand 1908 states and 5564 transitions. [2021-06-12 22:21:21,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 22:21:21,338 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:21:21,338 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:21:21,553 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-06-12 22:21:21,553 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:21:21,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:21:21,553 INFO L82 PathProgramCache]: Analyzing trace with hash -917598276, now seen corresponding path program 54 times [2021-06-12 22:21:21,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:21:21,553 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502120442] [2021-06-12 22:21:21,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:21:21,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:21:21,742 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:21:21,742 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:21:21,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502120442] [2021-06-12 22:21:21,742 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502120442] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:21:21,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162376977] [2021-06-12 22:21:21,742 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:21:21,772 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-12 22:21:21,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:21:21,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 22:21:21,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:21:21,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-12 22:21:21,866 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:21:21,872 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:21:21,873 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:21:21,873 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:19 [2021-06-12 22:21:22,070 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:21:22,070 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [162376977] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:21:22,070 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:21:22,070 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-06-12 22:21:22,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309353738] [2021-06-12 22:21:22,070 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 22:21:22,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:21:22,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 22:21:22,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2021-06-12 22:21:22,071 INFO L87 Difference]: Start difference. First operand 1908 states and 5564 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:22,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:21:22,766 INFO L93 Difference]: Finished difference Result 2798 states and 8083 transitions. [2021-06-12 22:21:22,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-12 22:21:22,766 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 22:21:22,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:21:22,770 INFO L225 Difference]: With dead ends: 2798 [2021-06-12 22:21:22,770 INFO L226 Difference]: Without dead ends: 2779 [2021-06-12 22:21:22,770 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 724.6ms TimeCoverageRelationStatistics Valid=183, Invalid=939, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 22:21:22,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2779 states. [2021-06-12 22:21:22,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2779 to 1900. [2021-06-12 22:21:22,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1900 states, 1899 states have (on average 2.9152185360716167) internal successors, (5536), 1899 states have internal predecessors, (5536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:22,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1900 states to 1900 states and 5536 transitions. [2021-06-12 22:21:22,791 INFO L78 Accepts]: Start accepts. Automaton has 1900 states and 5536 transitions. Word has length 33 [2021-06-12 22:21:22,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:21:22,791 INFO L482 AbstractCegarLoop]: Abstraction has 1900 states and 5536 transitions. [2021-06-12 22:21:22,791 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:22,792 INFO L276 IsEmpty]: Start isEmpty. Operand 1900 states and 5536 transitions. [2021-06-12 22:21:22,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 22:21:22,793 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:21:22,793 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:21:22,994 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-06-12 22:21:22,994 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:21:22,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:21:22,994 INFO L82 PathProgramCache]: Analyzing trace with hash 2097455084, now seen corresponding path program 55 times [2021-06-12 22:21:22,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:21:22,994 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283692498] [2021-06-12 22:21:22,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:21:22,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:21:23,155 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:21:23,155 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:21:23,155 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283692498] [2021-06-12 22:21:23,155 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1283692498] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:21:23,155 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1086059872] [2021-06-12 22:21:23,155 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:21:23,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:21:23,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 22:21:23,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:21:23,387 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:21:23,387 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1086059872] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:21:23,387 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:21:23,387 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-12 22:21:23,387 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52710726] [2021-06-12 22:21:23,387 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 22:21:23,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:21:23,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 22:21:23,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-06-12 22:21:23,388 INFO L87 Difference]: Start difference. First operand 1900 states and 5536 transitions. Second operand has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:24,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:21:24,381 INFO L93 Difference]: Finished difference Result 2680 states and 7637 transitions. [2021-06-12 22:21:24,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-12 22:21:24,381 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 22:21:24,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:21:24,384 INFO L225 Difference]: With dead ends: 2680 [2021-06-12 22:21:24,384 INFO L226 Difference]: Without dead ends: 2665 [2021-06-12 22:21:24,384 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 979.7ms TimeCoverageRelationStatistics Valid=195, Invalid=995, Unknown=0, NotChecked=0, Total=1190 [2021-06-12 22:21:24,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2665 states. [2021-06-12 22:21:24,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2665 to 1942. [2021-06-12 22:21:24,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1942 states, 1941 states have (on average 2.9206594538897477) internal successors, (5669), 1941 states have internal predecessors, (5669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:24,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1942 states to 1942 states and 5669 transitions. [2021-06-12 22:21:24,404 INFO L78 Accepts]: Start accepts. Automaton has 1942 states and 5669 transitions. Word has length 33 [2021-06-12 22:21:24,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:21:24,404 INFO L482 AbstractCegarLoop]: Abstraction has 1942 states and 5669 transitions. [2021-06-12 22:21:24,404 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:24,404 INFO L276 IsEmpty]: Start isEmpty. Operand 1942 states and 5669 transitions. [2021-06-12 22:21:24,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 22:21:24,406 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:21:24,406 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:21:24,623 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:21:24,624 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:21:24,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:21:24,624 INFO L82 PathProgramCache]: Analyzing trace with hash -433842282, now seen corresponding path program 56 times [2021-06-12 22:21:24,624 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:21:24,624 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202947372] [2021-06-12 22:21:24,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:21:24,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:21:24,783 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:21:24,783 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:21:24,784 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202947372] [2021-06-12 22:21:24,784 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202947372] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:21:24,784 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1818562123] [2021-06-12 22:21:24,784 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:21:24,819 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:21:24,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:21:24,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 22:21:24,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:21:24,919 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-12 22:21:24,920 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:21:24,927 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:21:24,928 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:21:24,928 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:19 [2021-06-12 22:21:25,110 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:21:25,110 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1818562123] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:21:25,110 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:21:25,110 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-06-12 22:21:25,110 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151164506] [2021-06-12 22:21:25,111 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 22:21:25,111 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:21:25,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 22:21:25,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2021-06-12 22:21:25,111 INFO L87 Difference]: Start difference. First operand 1942 states and 5669 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:25,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:21:25,787 INFO L93 Difference]: Finished difference Result 2932 states and 8415 transitions. [2021-06-12 22:21:25,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-12 22:21:25,787 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 22:21:25,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:21:25,791 INFO L225 Difference]: With dead ends: 2932 [2021-06-12 22:21:25,791 INFO L226 Difference]: Without dead ends: 2917 [2021-06-12 22:21:25,791 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 774.2ms TimeCoverageRelationStatistics Valid=183, Invalid=939, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 22:21:25,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2917 states. [2021-06-12 22:21:25,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2917 to 1889. [2021-06-12 22:21:25,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1889 states, 1888 states have (on average 2.9152542372881354) internal successors, (5504), 1888 states have internal predecessors, (5504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:25,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1889 states to 1889 states and 5504 transitions. [2021-06-12 22:21:25,814 INFO L78 Accepts]: Start accepts. Automaton has 1889 states and 5504 transitions. Word has length 33 [2021-06-12 22:21:25,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:21:25,815 INFO L482 AbstractCegarLoop]: Abstraction has 1889 states and 5504 transitions. [2021-06-12 22:21:25,815 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:25,815 INFO L276 IsEmpty]: Start isEmpty. Operand 1889 states and 5504 transitions. [2021-06-12 22:21:25,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 22:21:25,817 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:21:25,817 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:21:26,024 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-06-12 22:21:26,024 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:21:26,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:21:26,024 INFO L82 PathProgramCache]: Analyzing trace with hash -979540534, now seen corresponding path program 57 times [2021-06-12 22:21:26,024 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:21:26,024 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554087842] [2021-06-12 22:21:26,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:21:26,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:21:26,170 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:21:26,171 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:21:26,171 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554087842] [2021-06-12 22:21:26,171 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554087842] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:21:26,171 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [763809675] [2021-06-12 22:21:26,171 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:21:26,200 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 22:21:26,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:21:26,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 22:21:26,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:21:26,315 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-12 22:21:26,328 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:21:26,334 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:21:26,335 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:21:26,335 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:19 [2021-06-12 22:21:26,486 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:21:26,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [763809675] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:21:26,487 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:21:26,487 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-06-12 22:21:26,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592025875] [2021-06-12 22:21:26,487 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 22:21:26,487 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:21:26,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 22:21:26,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2021-06-12 22:21:26,487 INFO L87 Difference]: Start difference. First operand 1889 states and 5504 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:27,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:21:27,555 INFO L93 Difference]: Finished difference Result 2623 states and 7490 transitions. [2021-06-12 22:21:27,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-12 22:21:27,556 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 22:21:27,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:21:27,558 INFO L225 Difference]: With dead ends: 2623 [2021-06-12 22:21:27,558 INFO L226 Difference]: Without dead ends: 2608 [2021-06-12 22:21:27,559 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 401 ImplicationChecksByTransitivity, 1064.5ms TimeCoverageRelationStatistics Valid=266, Invalid=1374, Unknown=0, NotChecked=0, Total=1640 [2021-06-12 22:21:27,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2608 states. [2021-06-12 22:21:27,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2608 to 1893. [2021-06-12 22:21:27,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1893 states, 1892 states have (on average 2.9175475687103596) internal successors, (5520), 1892 states have internal predecessors, (5520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:27,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1893 states to 1893 states and 5520 transitions. [2021-06-12 22:21:27,579 INFO L78 Accepts]: Start accepts. Automaton has 1893 states and 5520 transitions. Word has length 33 [2021-06-12 22:21:27,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:21:27,579 INFO L482 AbstractCegarLoop]: Abstraction has 1893 states and 5520 transitions. [2021-06-12 22:21:27,579 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:27,580 INFO L276 IsEmpty]: Start isEmpty. Operand 1893 states and 5520 transitions. [2021-06-12 22:21:27,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 22:21:27,581 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:21:27,581 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:21:27,782 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:21:27,782 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:21:27,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:21:27,782 INFO L82 PathProgramCache]: Analyzing trace with hash -1855722998, now seen corresponding path program 58 times [2021-06-12 22:21:27,782 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:21:27,782 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304194666] [2021-06-12 22:21:27,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:21:27,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:21:27,935 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:21:27,936 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:21:27,936 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304194666] [2021-06-12 22:21:27,936 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1304194666] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:21:27,936 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [578037718] [2021-06-12 22:21:27,936 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:21:27,985 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:21:27,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:21:27,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 22:21:27,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:21:28,188 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:21:28,188 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [578037718] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:21:28,188 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:21:28,188 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-12 22:21:28,188 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254849384] [2021-06-12 22:21:28,188 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 22:21:28,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:21:28,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 22:21:28,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-06-12 22:21:28,189 INFO L87 Difference]: Start difference. First operand 1893 states and 5520 transitions. Second operand has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:28,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:21:28,920 INFO L93 Difference]: Finished difference Result 2900 states and 8334 transitions. [2021-06-12 22:21:28,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-12 22:21:28,920 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 22:21:28,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:21:28,923 INFO L225 Difference]: With dead ends: 2900 [2021-06-12 22:21:28,923 INFO L226 Difference]: Without dead ends: 2881 [2021-06-12 22:21:28,923 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 639.4ms TimeCoverageRelationStatistics Valid=138, Invalid=732, Unknown=0, NotChecked=0, Total=870 [2021-06-12 22:21:28,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2881 states. [2021-06-12 22:21:28,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2881 to 1881. [2021-06-12 22:21:28,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1881 states, 1880 states have (on average 2.9148936170212765) internal successors, (5480), 1880 states have internal predecessors, (5480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:28,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1881 states to 1881 states and 5480 transitions. [2021-06-12 22:21:28,945 INFO L78 Accepts]: Start accepts. Automaton has 1881 states and 5480 transitions. Word has length 33 [2021-06-12 22:21:28,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:21:28,945 INFO L482 AbstractCegarLoop]: Abstraction has 1881 states and 5480 transitions. [2021-06-12 22:21:28,945 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:28,945 INFO L276 IsEmpty]: Start isEmpty. Operand 1881 states and 5480 transitions. [2021-06-12 22:21:28,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 22:21:28,947 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:21:28,947 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:21:29,148 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2021-06-12 22:21:29,148 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:21:29,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:21:29,148 INFO L82 PathProgramCache]: Analyzing trace with hash 13785896, now seen corresponding path program 59 times [2021-06-12 22:21:29,148 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:21:29,148 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926095214] [2021-06-12 22:21:29,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:21:29,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:21:29,312 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:21:29,312 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:21:29,312 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926095214] [2021-06-12 22:21:29,313 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926095214] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:21:29,313 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [620961835] [2021-06-12 22:21:29,313 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:21:29,353 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:21:29,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:21:29,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 22:21:29,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:21:29,564 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:21:29,564 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [620961835] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:21:29,564 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:21:29,564 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-12 22:21:29,564 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779915663] [2021-06-12 22:21:29,565 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 22:21:29,565 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:21:29,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 22:21:29,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-06-12 22:21:29,565 INFO L87 Difference]: Start difference. First operand 1881 states and 5480 transitions. Second operand has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:30,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:21:30,493 INFO L93 Difference]: Finished difference Result 2510 states and 7169 transitions. [2021-06-12 22:21:30,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-12 22:21:30,493 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 22:21:30,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:21:30,496 INFO L225 Difference]: With dead ends: 2510 [2021-06-12 22:21:30,496 INFO L226 Difference]: Without dead ends: 2495 [2021-06-12 22:21:30,496 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 879.0ms TimeCoverageRelationStatistics Valid=176, Invalid=880, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 22:21:30,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2495 states. [2021-06-12 22:21:30,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2495 to 1902. [2021-06-12 22:21:30,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1902 states, 1901 states have (on average 2.923198316675434) internal successors, (5557), 1901 states have internal predecessors, (5557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:30,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1902 states to 1902 states and 5557 transitions. [2021-06-12 22:21:30,517 INFO L78 Accepts]: Start accepts. Automaton has 1902 states and 5557 transitions. Word has length 33 [2021-06-12 22:21:30,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:21:30,517 INFO L482 AbstractCegarLoop]: Abstraction has 1902 states and 5557 transitions. [2021-06-12 22:21:30,517 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:30,517 INFO L276 IsEmpty]: Start isEmpty. Operand 1902 states and 5557 transitions. [2021-06-12 22:21:30,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 22:21:30,519 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:21:30,519 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:21:30,736 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:21:30,736 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:21:30,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:21:30,736 INFO L82 PathProgramCache]: Analyzing trace with hash 1777455826, now seen corresponding path program 60 times [2021-06-12 22:21:30,736 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:21:30,736 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161563809] [2021-06-12 22:21:30,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:21:30,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:21:30,886 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:21:30,886 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:21:30,886 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161563809] [2021-06-12 22:21:30,886 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1161563809] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:21:30,886 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [273859616] [2021-06-12 22:21:30,886 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:21:30,918 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 22:21:30,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:21:30,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 22:21:30,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:21:31,186 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:21:31,186 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [273859616] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:21:31,186 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:21:31,186 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-06-12 22:21:31,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157755561] [2021-06-12 22:21:31,186 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 22:21:31,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:21:31,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 22:21:31,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2021-06-12 22:21:31,187 INFO L87 Difference]: Start difference. First operand 1902 states and 5557 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:31,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:21:31,916 INFO L93 Difference]: Finished difference Result 2848 states and 8175 transitions. [2021-06-12 22:21:31,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-12 22:21:31,916 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 22:21:31,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:21:31,919 INFO L225 Difference]: With dead ends: 2848 [2021-06-12 22:21:31,919 INFO L226 Difference]: Without dead ends: 2833 [2021-06-12 22:21:31,919 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 741.6ms TimeCoverageRelationStatistics Valid=175, Invalid=881, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 22:21:31,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2833 states. [2021-06-12 22:21:31,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2833 to 1784. [2021-06-12 22:21:31,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1784 states, 1783 states have (on average 2.9209197980931014) internal successors, (5208), 1783 states have internal predecessors, (5208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:31,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1784 states to 1784 states and 5208 transitions. [2021-06-12 22:21:31,945 INFO L78 Accepts]: Start accepts. Automaton has 1784 states and 5208 transitions. Word has length 33 [2021-06-12 22:21:31,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:21:31,945 INFO L482 AbstractCegarLoop]: Abstraction has 1784 states and 5208 transitions. [2021-06-12 22:21:31,945 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:31,945 INFO L276 IsEmpty]: Start isEmpty. Operand 1784 states and 5208 transitions. [2021-06-12 22:21:31,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 22:21:31,948 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:21:31,948 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:21:32,160 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2021-06-12 22:21:32,161 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:21:32,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:21:32,161 INFO L82 PathProgramCache]: Analyzing trace with hash -663884432, now seen corresponding path program 61 times [2021-06-12 22:21:32,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:21:32,161 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381709375] [2021-06-12 22:21:32,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:21:32,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:21:32,169 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:21:32,169 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:21:32,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381709375] [2021-06-12 22:21:32,169 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381709375] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 22:21:32,169 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 22:21:32,170 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-12 22:21:32,170 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000922116] [2021-06-12 22:21:32,170 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-12 22:21:32,170 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:21:32,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-12 22:21:32,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-12 22:21:32,171 INFO L87 Difference]: Start difference. First operand 1784 states and 5208 transitions. Second operand has 3 states, 3 states have (on average 11.0) internal successors, (33), 2 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:32,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:21:32,178 INFO L93 Difference]: Finished difference Result 1474 states and 4216 transitions. [2021-06-12 22:21:32,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-12 22:21:32,178 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 2 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 22:21:32,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:21:32,179 INFO L225 Difference]: With dead ends: 1474 [2021-06-12 22:21:32,179 INFO L226 Difference]: Without dead ends: 1474 [2021-06-12 22:21:32,180 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-12 22:21:32,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1474 states. [2021-06-12 22:21:32,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1474 to 1474. [2021-06-12 22:21:32,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1474 states, 1473 states have (on average 2.8621860149355056) internal successors, (4216), 1473 states have internal predecessors, (4216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:32,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1474 states to 1474 states and 4216 transitions. [2021-06-12 22:21:32,194 INFO L78 Accepts]: Start accepts. Automaton has 1474 states and 4216 transitions. Word has length 33 [2021-06-12 22:21:32,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:21:32,194 INFO L482 AbstractCegarLoop]: Abstraction has 1474 states and 4216 transitions. [2021-06-12 22:21:32,195 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 2 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:32,195 INFO L276 IsEmpty]: Start isEmpty. Operand 1474 states and 4216 transitions. [2021-06-12 22:21:32,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 22:21:32,196 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:21:32,196 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:21:32,196 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2021-06-12 22:21:32,196 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:21:32,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:21:32,197 INFO L82 PathProgramCache]: Analyzing trace with hash 104078596, now seen corresponding path program 62 times [2021-06-12 22:21:32,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:21:32,197 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525066181] [2021-06-12 22:21:32,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:21:32,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:21:32,333 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:21:32,333 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:21:32,333 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525066181] [2021-06-12 22:21:32,334 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [525066181] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:21:32,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1770904437] [2021-06-12 22:21:32,334 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:21:32,363 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:21:32,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:21:32,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 22:21:32,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:21:32,492 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-12 22:21:32,493 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:21:32,500 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:21:32,500 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:21:32,500 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:19 [2021-06-12 22:21:32,587 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:21:32,587 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1770904437] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:21:32,588 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:21:32,588 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-06-12 22:21:32,588 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728183821] [2021-06-12 22:21:32,588 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 22:21:32,588 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:21:32,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 22:21:32,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2021-06-12 22:21:32,588 INFO L87 Difference]: Start difference. First operand 1474 states and 4216 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:33,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:21:33,059 INFO L93 Difference]: Finished difference Result 2467 states and 6892 transitions. [2021-06-12 22:21:33,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 22:21:33,059 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 22:21:33,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:21:33,062 INFO L225 Difference]: With dead ends: 2467 [2021-06-12 22:21:33,062 INFO L226 Difference]: Without dead ends: 2452 [2021-06-12 22:21:33,062 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 456.2ms TimeCoverageRelationStatistics Valid=141, Invalid=671, Unknown=0, NotChecked=0, Total=812 [2021-06-12 22:21:33,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2452 states. [2021-06-12 22:21:33,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2452 to 1513. [2021-06-12 22:21:33,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1513 states, 1512 states have (on average 2.8624338624338623) internal successors, (4328), 1512 states have internal predecessors, (4328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:33,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1513 states to 1513 states and 4328 transitions. [2021-06-12 22:21:33,080 INFO L78 Accepts]: Start accepts. Automaton has 1513 states and 4328 transitions. Word has length 33 [2021-06-12 22:21:33,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:21:33,080 INFO L482 AbstractCegarLoop]: Abstraction has 1513 states and 4328 transitions. [2021-06-12 22:21:33,080 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:33,080 INFO L276 IsEmpty]: Start isEmpty. Operand 1513 states and 4328 transitions. [2021-06-12 22:21:33,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 22:21:33,081 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:21:33,081 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:21:33,282 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:21:33,282 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:21:33,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:21:33,282 INFO L82 PathProgramCache]: Analyzing trace with hash 211528964, now seen corresponding path program 63 times [2021-06-12 22:21:33,282 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:21:33,282 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548138831] [2021-06-12 22:21:33,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:21:33,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:21:33,458 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:21:33,458 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:21:33,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548138831] [2021-06-12 22:21:33,458 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548138831] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:21:33,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [304316855] [2021-06-12 22:21:33,458 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:21:33,495 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 22:21:33,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:21:33,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 22:21:33,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:21:33,636 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-12 22:21:33,637 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:21:33,645 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:21:33,646 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:21:33,646 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:21 [2021-06-12 22:21:33,812 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:21:33,813 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [304316855] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:21:33,813 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:21:33,813 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-06-12 22:21:33,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090435954] [2021-06-12 22:21:33,814 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 22:21:33,814 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:21:33,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 22:21:33,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2021-06-12 22:21:33,814 INFO L87 Difference]: Start difference. First operand 1513 states and 4328 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:34,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:21:34,614 INFO L93 Difference]: Finished difference Result 2081 states and 5793 transitions. [2021-06-12 22:21:34,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-12 22:21:34,615 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 22:21:34,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:21:34,617 INFO L225 Difference]: With dead ends: 2081 [2021-06-12 22:21:34,617 INFO L226 Difference]: Without dead ends: 2066 [2021-06-12 22:21:34,617 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 809.8ms TimeCoverageRelationStatistics Valid=178, Invalid=878, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 22:21:34,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2066 states. [2021-06-12 22:21:34,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2066 to 1525. [2021-06-12 22:21:34,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1525 states, 1524 states have (on average 2.8661417322834644) internal successors, (4368), 1524 states have internal predecessors, (4368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:34,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1525 states to 1525 states and 4368 transitions. [2021-06-12 22:21:34,633 INFO L78 Accepts]: Start accepts. Automaton has 1525 states and 4368 transitions. Word has length 33 [2021-06-12 22:21:34,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:21:34,633 INFO L482 AbstractCegarLoop]: Abstraction has 1525 states and 4368 transitions. [2021-06-12 22:21:34,633 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:34,633 INFO L276 IsEmpty]: Start isEmpty. Operand 1525 states and 4368 transitions. [2021-06-12 22:21:34,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 22:21:34,634 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:21:34,634 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:21:34,837 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-06-12 22:21:34,837 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:21:34,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:21:34,837 INFO L82 PathProgramCache]: Analyzing trace with hash -664653500, now seen corresponding path program 64 times [2021-06-12 22:21:34,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:21:34,837 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180245261] [2021-06-12 22:21:34,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:21:34,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:21:34,968 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:21:34,968 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:21:34,968 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180245261] [2021-06-12 22:21:34,968 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1180245261] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:21:34,968 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [623647200] [2021-06-12 22:21:34,968 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:21:34,998 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:21:34,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:21:34,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 22:21:34,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:21:35,225 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:21:35,225 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [623647200] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:21:35,225 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:21:35,225 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-12 22:21:35,225 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911592316] [2021-06-12 22:21:35,226 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 22:21:35,226 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:21:35,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 22:21:35,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-12 22:21:35,226 INFO L87 Difference]: Start difference. First operand 1525 states and 4368 transitions. Second operand has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 18 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:35,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:21:35,818 INFO L93 Difference]: Finished difference Result 2367 states and 6619 transitions. [2021-06-12 22:21:35,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 22:21:35,819 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 18 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 22:21:35,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:21:35,821 INFO L225 Difference]: With dead ends: 2367 [2021-06-12 22:21:35,821 INFO L226 Difference]: Without dead ends: 2348 [2021-06-12 22:21:35,821 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 513.1ms TimeCoverageRelationStatistics Valid=122, Invalid=580, Unknown=0, NotChecked=0, Total=702 [2021-06-12 22:21:35,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2348 states. [2021-06-12 22:21:35,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2348 to 1521. [2021-06-12 22:21:35,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1521 states, 1520 states have (on average 2.863157894736842) internal successors, (4352), 1520 states have internal predecessors, (4352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:35,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1521 states to 1521 states and 4352 transitions. [2021-06-12 22:21:35,837 INFO L78 Accepts]: Start accepts. Automaton has 1521 states and 4352 transitions. Word has length 33 [2021-06-12 22:21:35,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:21:35,837 INFO L482 AbstractCegarLoop]: Abstraction has 1521 states and 4352 transitions. [2021-06-12 22:21:35,837 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 18 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:35,837 INFO L276 IsEmpty]: Start isEmpty. Operand 1521 states and 4352 transitions. [2021-06-12 22:21:35,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 22:21:35,839 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:21:35,839 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:21:36,039 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:21:36,039 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:21:36,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:21:36,044 INFO L82 PathProgramCache]: Analyzing trace with hash -522938360, now seen corresponding path program 65 times [2021-06-12 22:21:36,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:21:36,045 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937855988] [2021-06-12 22:21:36,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:21:36,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:21:36,188 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:21:36,188 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:21:36,188 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937855988] [2021-06-12 22:21:36,188 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937855988] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:21:36,188 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1065943314] [2021-06-12 22:21:36,188 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:21:36,219 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:21:36,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:21:36,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 22:21:36,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:21:36,449 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:21:36,450 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1065943314] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:21:36,450 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:21:36,450 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-12 22:21:36,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969286998] [2021-06-12 22:21:36,450 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 22:21:36,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:21:36,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 22:21:36,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-06-12 22:21:36,451 INFO L87 Difference]: Start difference. First operand 1521 states and 4352 transitions. Second operand has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 18 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:37,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:21:37,200 INFO L93 Difference]: Finished difference Result 2637 states and 7354 transitions. [2021-06-12 22:21:37,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 22:21:37,201 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 18 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 22:21:37,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:21:37,203 INFO L225 Difference]: With dead ends: 2637 [2021-06-12 22:21:37,203 INFO L226 Difference]: Without dead ends: 2622 [2021-06-12 22:21:37,204 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 605.5ms TimeCoverageRelationStatistics Valid=150, Invalid=720, Unknown=0, NotChecked=0, Total=870 [2021-06-12 22:21:37,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2622 states. [2021-06-12 22:21:37,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2622 to 1527. [2021-06-12 22:21:37,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1527 states, 1526 states have (on average 2.8636959370904327) internal successors, (4370), 1526 states have internal predecessors, (4370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:37,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1527 states to 1527 states and 4370 transitions. [2021-06-12 22:21:37,228 INFO L78 Accepts]: Start accepts. Automaton has 1527 states and 4370 transitions. Word has length 33 [2021-06-12 22:21:37,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:21:37,228 INFO L482 AbstractCegarLoop]: Abstraction has 1527 states and 4370 transitions. [2021-06-12 22:21:37,228 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 18 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:37,228 INFO L276 IsEmpty]: Start isEmpty. Operand 1527 states and 4370 transitions. [2021-06-12 22:21:37,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 22:21:37,230 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:21:37,230 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:21:37,444 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-06-12 22:21:37,445 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:21:37,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:21:37,445 INFO L82 PathProgramCache]: Analyzing trace with hash -1806085820, now seen corresponding path program 66 times [2021-06-12 22:21:37,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:21:37,445 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432718740] [2021-06-12 22:21:37,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:21:37,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:21:37,584 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:21:37,585 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:21:37,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432718740] [2021-06-12 22:21:37,585 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [432718740] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:21:37,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [832375297] [2021-06-12 22:21:37,585 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:21:37,616 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-12 22:21:37,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:21:37,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 22:21:37,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:21:37,724 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-12 22:21:37,725 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:21:37,732 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:21:37,732 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:21:37,732 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:21 [2021-06-12 22:21:37,846 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:21:37,846 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [832375297] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:21:37,847 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:21:37,847 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-06-12 22:21:37,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691108687] [2021-06-12 22:21:37,847 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 22:21:37,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:21:37,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 22:21:37,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2021-06-12 22:21:37,847 INFO L87 Difference]: Start difference. First operand 1527 states and 4370 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:38,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:21:38,464 INFO L93 Difference]: Finished difference Result 2636 states and 7339 transitions. [2021-06-12 22:21:38,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-12 22:21:38,465 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 22:21:38,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:21:38,467 INFO L225 Difference]: With dead ends: 2636 [2021-06-12 22:21:38,467 INFO L226 Difference]: Without dead ends: 2621 [2021-06-12 22:21:38,468 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 537.2ms TimeCoverageRelationStatistics Valid=145, Invalid=725, Unknown=0, NotChecked=0, Total=870 [2021-06-12 22:21:38,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2621 states. [2021-06-12 22:21:38,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2621 to 1507. [2021-06-12 22:21:38,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1507 states, 1506 states have (on average 2.861885790172643) internal successors, (4310), 1506 states have internal predecessors, (4310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:38,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1507 states to 1507 states and 4310 transitions. [2021-06-12 22:21:38,485 INFO L78 Accepts]: Start accepts. Automaton has 1507 states and 4310 transitions. Word has length 33 [2021-06-12 22:21:38,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:21:38,485 INFO L482 AbstractCegarLoop]: Abstraction has 1507 states and 4310 transitions. [2021-06-12 22:21:38,485 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:38,485 INFO L276 IsEmpty]: Start isEmpty. Operand 1507 states and 4310 transitions. [2021-06-12 22:21:38,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 22:21:38,486 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:21:38,486 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:21:38,687 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-06-12 22:21:38,687 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:21:38,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:21:38,688 INFO L82 PathProgramCache]: Analyzing trace with hash -1584206588, now seen corresponding path program 67 times [2021-06-12 22:21:38,688 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:21:38,688 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958105354] [2021-06-12 22:21:38,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:21:38,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:21:38,822 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:21:38,823 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:21:38,823 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958105354] [2021-06-12 22:21:38,823 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [958105354] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:21:38,823 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1491874272] [2021-06-12 22:21:38,823 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:21:38,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:21:38,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 22:21:38,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:21:39,073 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:21:39,074 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1491874272] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:21:39,074 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:21:39,074 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-12 22:21:39,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533219686] [2021-06-12 22:21:39,074 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 22:21:39,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:21:39,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 22:21:39,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-06-12 22:21:39,074 INFO L87 Difference]: Start difference. First operand 1507 states and 4310 transitions. Second operand has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 18 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:39,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:21:39,532 INFO L93 Difference]: Finished difference Result 2483 states and 6920 transitions. [2021-06-12 22:21:39,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 22:21:39,533 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 18 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 22:21:39,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:21:39,535 INFO L225 Difference]: With dead ends: 2483 [2021-06-12 22:21:39,535 INFO L226 Difference]: Without dead ends: 2468 [2021-06-12 22:21:39,535 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 479.3ms TimeCoverageRelationStatistics Valid=119, Invalid=531, Unknown=0, NotChecked=0, Total=650 [2021-06-12 22:21:39,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2468 states. [2021-06-12 22:21:39,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2468 to 1576. [2021-06-12 22:21:39,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1576 states, 1575 states have (on average 2.843809523809524) internal successors, (4479), 1575 states have internal predecessors, (4479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:39,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1576 states to 1576 states and 4479 transitions. [2021-06-12 22:21:39,552 INFO L78 Accepts]: Start accepts. Automaton has 1576 states and 4479 transitions. Word has length 33 [2021-06-12 22:21:39,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:21:39,552 INFO L482 AbstractCegarLoop]: Abstraction has 1576 states and 4479 transitions. [2021-06-12 22:21:39,552 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 18 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:39,552 INFO L276 IsEmpty]: Start isEmpty. Operand 1576 states and 4479 transitions. [2021-06-12 22:21:39,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 22:21:39,554 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:21:39,554 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:21:39,754 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-06-12 22:21:39,754 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:21:39,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:21:39,754 INFO L82 PathProgramCache]: Analyzing trace with hash -1558137712, now seen corresponding path program 68 times [2021-06-12 22:21:39,755 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:21:39,755 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791048008] [2021-06-12 22:21:39,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:21:39,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:21:39,893 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:21:39,894 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:21:39,894 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791048008] [2021-06-12 22:21:39,894 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791048008] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:21:39,894 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [769159821] [2021-06-12 22:21:39,894 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:21:39,923 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:21:39,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:21:39,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 22:21:39,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:21:40,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-12 22:21:40,033 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:21:40,040 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:21:40,040 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:21:40,041 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:23 [2021-06-12 22:21:40,168 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:21:40,168 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [769159821] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:21:40,168 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:21:40,168 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-06-12 22:21:40,168 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608432691] [2021-06-12 22:21:40,168 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 22:21:40,168 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:21:40,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 22:21:40,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2021-06-12 22:21:40,169 INFO L87 Difference]: Start difference. First operand 1576 states and 4479 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:40,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:21:40,960 INFO L93 Difference]: Finished difference Result 2059 states and 5724 transitions. [2021-06-12 22:21:40,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 22:21:40,960 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 22:21:40,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:21:40,962 INFO L225 Difference]: With dead ends: 2059 [2021-06-12 22:21:40,962 INFO L226 Difference]: Without dead ends: 2044 [2021-06-12 22:21:40,962 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 757.2ms TimeCoverageRelationStatistics Valid=178, Invalid=878, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 22:21:40,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2044 states. [2021-06-12 22:21:40,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2044 to 1594. [2021-06-12 22:21:40,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1594 states, 1593 states have (on average 2.8455743879472695) internal successors, (4533), 1593 states have internal predecessors, (4533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:40,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1594 states to 1594 states and 4533 transitions. [2021-06-12 22:21:40,978 INFO L78 Accepts]: Start accepts. Automaton has 1594 states and 4533 transitions. Word has length 33 [2021-06-12 22:21:40,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:21:40,978 INFO L482 AbstractCegarLoop]: Abstraction has 1594 states and 4533 transitions. [2021-06-12 22:21:40,978 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:40,978 INFO L276 IsEmpty]: Start isEmpty. Operand 1594 states and 4533 transitions. [2021-06-12 22:21:40,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 22:21:40,979 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:21:40,980 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:21:41,180 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:21:41,180 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:21:41,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:21:41,180 INFO L82 PathProgramCache]: Analyzing trace with hash -1786896556, now seen corresponding path program 69 times [2021-06-12 22:21:41,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:21:41,181 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641336004] [2021-06-12 22:21:41,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:21:41,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:21:41,317 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:21:41,317 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:21:41,317 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641336004] [2021-06-12 22:21:41,317 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [641336004] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:21:41,317 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [705514782] [2021-06-12 22:21:41,317 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:21:41,346 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 22:21:41,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:21:41,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 22:21:41,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:21:41,577 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:21:41,577 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [705514782] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:21:41,577 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:21:41,577 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-06-12 22:21:41,577 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11989795] [2021-06-12 22:21:41,578 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 22:21:41,578 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:21:41,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 22:21:41,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2021-06-12 22:21:41,578 INFO L87 Difference]: Start difference. First operand 1594 states and 4533 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:42,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:21:42,082 INFO L93 Difference]: Finished difference Result 2345 states and 6550 transitions. [2021-06-12 22:21:42,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 22:21:42,083 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 22:21:42,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:21:42,085 INFO L225 Difference]: With dead ends: 2345 [2021-06-12 22:21:42,085 INFO L226 Difference]: Without dead ends: 2330 [2021-06-12 22:21:42,085 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 527.6ms TimeCoverageRelationStatistics Valid=140, Invalid=672, Unknown=0, NotChecked=0, Total=812 [2021-06-12 22:21:42,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2330 states. [2021-06-12 22:21:42,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2330 to 1588. [2021-06-12 22:21:42,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1588 states, 1587 states have (on average 2.8424700693131695) internal successors, (4511), 1587 states have internal predecessors, (4511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:42,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1588 states to 1588 states and 4511 transitions. [2021-06-12 22:21:42,101 INFO L78 Accepts]: Start accepts. Automaton has 1588 states and 4511 transitions. Word has length 33 [2021-06-12 22:21:42,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:21:42,101 INFO L482 AbstractCegarLoop]: Abstraction has 1588 states and 4511 transitions. [2021-06-12 22:21:42,102 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:42,102 INFO L276 IsEmpty]: Start isEmpty. Operand 1588 states and 4511 transitions. [2021-06-12 22:21:42,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 22:21:42,103 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:21:42,103 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:21:42,303 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:21:42,304 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:21:42,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:21:42,304 INFO L82 PathProgramCache]: Analyzing trace with hash 1561338940, now seen corresponding path program 70 times [2021-06-12 22:21:42,304 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:21:42,304 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483747451] [2021-06-12 22:21:42,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:21:42,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:21:42,449 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:21:42,450 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:21:42,450 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483747451] [2021-06-12 22:21:42,450 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483747451] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:21:42,450 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [496707310] [2021-06-12 22:21:42,450 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:21:42,478 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:21:42,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:21:42,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 22:21:42,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:21:42,687 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:21:42,687 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [496707310] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:21:42,687 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:21:42,687 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-12 22:21:42,687 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254720083] [2021-06-12 22:21:42,687 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 22:21:42,687 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:21:42,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 22:21:42,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-06-12 22:21:42,688 INFO L87 Difference]: Start difference. First operand 1588 states and 4511 transitions. Second operand has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 18 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:43,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:21:43,314 INFO L93 Difference]: Finished difference Result 2502 states and 6967 transitions. [2021-06-12 22:21:43,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 22:21:43,314 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 18 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 22:21:43,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:21:43,317 INFO L225 Difference]: With dead ends: 2502 [2021-06-12 22:21:43,317 INFO L226 Difference]: Without dead ends: 2487 [2021-06-12 22:21:43,317 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 553.9ms TimeCoverageRelationStatistics Valid=139, Invalid=617, Unknown=0, NotChecked=0, Total=756 [2021-06-12 22:21:43,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2487 states. [2021-06-12 22:21:43,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2487 to 1594. [2021-06-12 22:21:43,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1594 states, 1593 states have (on average 2.84180790960452) internal successors, (4527), 1593 states have internal predecessors, (4527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:43,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1594 states to 1594 states and 4527 transitions. [2021-06-12 22:21:43,333 INFO L78 Accepts]: Start accepts. Automaton has 1594 states and 4527 transitions. Word has length 33 [2021-06-12 22:21:43,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:21:43,333 INFO L482 AbstractCegarLoop]: Abstraction has 1594 states and 4527 transitions. [2021-06-12 22:21:43,333 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 18 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:43,333 INFO L276 IsEmpty]: Start isEmpty. Operand 1594 states and 4527 transitions. [2021-06-12 22:21:43,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 22:21:43,335 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:21:43,335 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:21:43,536 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:21:43,537 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:21:43,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:21:43,537 INFO L82 PathProgramCache]: Analyzing trace with hash 1406901422, now seen corresponding path program 71 times [2021-06-12 22:21:43,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:21:43,537 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851174986] [2021-06-12 22:21:43,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:21:43,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:21:43,675 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:21:43,676 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:21:43,676 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851174986] [2021-06-12 22:21:43,676 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851174986] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:21:43,676 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [445704518] [2021-06-12 22:21:43,676 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:21:43,705 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:21:43,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:21:43,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 22:21:43,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:21:43,912 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:21:43,912 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [445704518] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:21:43,912 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:21:43,912 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-12 22:21:43,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771969040] [2021-06-12 22:21:43,912 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 22:21:43,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:21:43,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 22:21:43,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-06-12 22:21:43,913 INFO L87 Difference]: Start difference. First operand 1594 states and 4527 transitions. Second operand has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 18 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:44,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:21:44,480 INFO L93 Difference]: Finished difference Result 2501 states and 6968 transitions. [2021-06-12 22:21:44,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 22:21:44,481 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 18 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 22:21:44,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:21:44,484 INFO L225 Difference]: With dead ends: 2501 [2021-06-12 22:21:44,484 INFO L226 Difference]: Without dead ends: 2486 [2021-06-12 22:21:44,484 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 480.8ms TimeCoverageRelationStatistics Valid=118, Invalid=532, Unknown=0, NotChecked=0, Total=650 [2021-06-12 22:21:44,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2486 states. [2021-06-12 22:21:44,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2486 to 1519. [2021-06-12 22:21:44,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1519 states, 1518 states have (on average 2.86034255599473) internal successors, (4342), 1518 states have internal predecessors, (4342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:44,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1519 states to 1519 states and 4342 transitions. [2021-06-12 22:21:44,510 INFO L78 Accepts]: Start accepts. Automaton has 1519 states and 4342 transitions. Word has length 33 [2021-06-12 22:21:44,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:21:44,511 INFO L482 AbstractCegarLoop]: Abstraction has 1519 states and 4342 transitions. [2021-06-12 22:21:44,511 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 18 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:44,511 INFO L276 IsEmpty]: Start isEmpty. Operand 1519 states and 4342 transitions. [2021-06-12 22:21:44,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 22:21:44,512 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:21:44,512 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:21:44,712 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable73 [2021-06-12 22:21:44,713 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:21:44,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:21:44,713 INFO L82 PathProgramCache]: Analyzing trace with hash -116485948, now seen corresponding path program 72 times [2021-06-12 22:21:44,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:21:44,713 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483581509] [2021-06-12 22:21:44,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:21:44,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:21:44,846 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:21:44,847 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:21:44,847 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483581509] [2021-06-12 22:21:44,847 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483581509] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:21:44,847 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1133136886] [2021-06-12 22:21:44,847 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:21:44,875 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-12 22:21:44,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:21:44,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 22:21:44,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:21:44,960 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-12 22:21:44,961 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:21:44,968 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:21:44,968 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:21:44,968 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:19 [2021-06-12 22:21:45,132 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:21:45,133 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1133136886] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:21:45,133 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:21:45,133 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-06-12 22:21:45,133 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900485458] [2021-06-12 22:21:45,133 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 22:21:45,133 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:21:45,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 22:21:45,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-06-12 22:21:45,133 INFO L87 Difference]: Start difference. First operand 1519 states and 4342 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:45,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:21:45,927 INFO L93 Difference]: Finished difference Result 1859 states and 5232 transitions. [2021-06-12 22:21:45,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 22:21:45,927 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 22:21:45,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:21:45,929 INFO L225 Difference]: With dead ends: 1859 [2021-06-12 22:21:45,929 INFO L226 Difference]: Without dead ends: 1844 [2021-06-12 22:21:45,929 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 728.6ms TimeCoverageRelationStatistics Valid=180, Invalid=812, Unknown=0, NotChecked=0, Total=992 [2021-06-12 22:21:45,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1844 states. [2021-06-12 22:21:45,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1844 to 1527. [2021-06-12 22:21:45,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1527 states, 1526 states have (on average 2.865006553079948) internal successors, (4372), 1526 states have internal predecessors, (4372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:45,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1527 states to 1527 states and 4372 transitions. [2021-06-12 22:21:45,944 INFO L78 Accepts]: Start accepts. Automaton has 1527 states and 4372 transitions. Word has length 33 [2021-06-12 22:21:45,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:21:45,944 INFO L482 AbstractCegarLoop]: Abstraction has 1527 states and 4372 transitions. [2021-06-12 22:21:45,944 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:45,944 INFO L276 IsEmpty]: Start isEmpty. Operand 1527 states and 4372 transitions. [2021-06-12 22:21:45,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 22:21:45,945 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:21:45,945 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:21:46,145 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:21:46,146 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:21:46,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:21:46,146 INFO L82 PathProgramCache]: Analyzing trace with hash -992668412, now seen corresponding path program 73 times [2021-06-12 22:21:46,146 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:21:46,146 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762822035] [2021-06-12 22:21:46,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:21:46,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:21:46,281 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:21:46,281 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:21:46,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762822035] [2021-06-12 22:21:46,281 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1762822035] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:21:46,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1544399942] [2021-06-12 22:21:46,281 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:21:46,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:21:46,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 22:21:46,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:21:46,529 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:21:46,529 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1544399942] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:21:46,529 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:21:46,529 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-12 22:21:46,529 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713247107] [2021-06-12 22:21:46,529 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 22:21:46,529 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:21:46,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 22:21:46,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-06-12 22:21:46,530 INFO L87 Difference]: Start difference. First operand 1527 states and 4372 transitions. Second operand has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 18 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:47,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:21:47,325 INFO L93 Difference]: Finished difference Result 1887 states and 5291 transitions. [2021-06-12 22:21:47,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 22:21:47,325 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 18 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 22:21:47,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:21:47,327 INFO L225 Difference]: With dead ends: 1887 [2021-06-12 22:21:47,327 INFO L226 Difference]: Without dead ends: 1868 [2021-06-12 22:21:47,327 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 714.7ms TimeCoverageRelationStatistics Valid=148, Invalid=722, Unknown=0, NotChecked=0, Total=870 [2021-06-12 22:21:47,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1868 states. [2021-06-12 22:21:47,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1868 to 1523. [2021-06-12 22:21:47,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1523 states, 1522 states have (on average 2.862023653088042) internal successors, (4356), 1522 states have internal predecessors, (4356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:47,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1523 states to 1523 states and 4356 transitions. [2021-06-12 22:21:47,342 INFO L78 Accepts]: Start accepts. Automaton has 1523 states and 4356 transitions. Word has length 33 [2021-06-12 22:21:47,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:21:47,342 INFO L482 AbstractCegarLoop]: Abstraction has 1523 states and 4356 transitions. [2021-06-12 22:21:47,342 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 18 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:47,342 INFO L276 IsEmpty]: Start isEmpty. Operand 1523 states and 4356 transitions. [2021-06-12 22:21:47,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 22:21:47,343 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:21:47,344 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:21:47,544 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:21:47,544 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:21:47,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:21:47,544 INFO L82 PathProgramCache]: Analyzing trace with hash 251378948, now seen corresponding path program 74 times [2021-06-12 22:21:47,544 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:21:47,544 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219248723] [2021-06-12 22:21:47,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:21:47,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:21:47,697 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:21:47,697 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:21:47,697 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219248723] [2021-06-12 22:21:47,697 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [219248723] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:21:47,698 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [499450427] [2021-06-12 22:21:47,698 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:21:47,727 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:21:47,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:21:47,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 22:21:47,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:21:47,815 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-12 22:21:47,816 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:21:47,823 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:21:47,823 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:21:47,824 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:19 [2021-06-12 22:21:47,979 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:21:47,980 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [499450427] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:21:47,980 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:21:47,980 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-06-12 22:21:47,980 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671402572] [2021-06-12 22:21:47,980 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 22:21:47,980 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:21:47,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 22:21:47,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-06-12 22:21:47,980 INFO L87 Difference]: Start difference. First operand 1523 states and 4356 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:48,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:21:48,732 INFO L93 Difference]: Finished difference Result 1849 states and 5192 transitions. [2021-06-12 22:21:48,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 22:21:48,732 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 22:21:48,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:21:48,734 INFO L225 Difference]: With dead ends: 1849 [2021-06-12 22:21:48,734 INFO L226 Difference]: Without dead ends: 1834 [2021-06-12 22:21:48,734 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 752.5ms TimeCoverageRelationStatistics Valid=180, Invalid=812, Unknown=0, NotChecked=0, Total=992 [2021-06-12 22:21:48,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1834 states. [2021-06-12 22:21:48,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1834 to 1529. [2021-06-12 22:21:48,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1529 states, 1528 states have (on average 2.865183246073298) internal successors, (4378), 1528 states have internal predecessors, (4378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:48,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1529 states to 1529 states and 4378 transitions. [2021-06-12 22:21:48,748 INFO L78 Accepts]: Start accepts. Automaton has 1529 states and 4378 transitions. Word has length 33 [2021-06-12 22:21:48,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:21:48,748 INFO L482 AbstractCegarLoop]: Abstraction has 1529 states and 4378 transitions. [2021-06-12 22:21:48,748 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:48,748 INFO L276 IsEmpty]: Start isEmpty. Operand 1529 states and 4378 transitions. [2021-06-12 22:21:48,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 22:21:48,750 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:21:48,750 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:21:48,950 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:21:48,950 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:21:48,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:21:48,951 INFO L82 PathProgramCache]: Analyzing trace with hash 2015048878, now seen corresponding path program 75 times [2021-06-12 22:21:48,951 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:21:48,951 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403153] [2021-06-12 22:21:48,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:21:48,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:21:49,085 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:21:49,086 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:21:49,086 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403153] [2021-06-12 22:21:49,086 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403153] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:21:49,086 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [28331268] [2021-06-12 22:21:49,086 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:21:49,115 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 22:21:49,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:21:49,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 22:21:49,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:21:49,353 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:21:49,353 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [28331268] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:21:49,353 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:21:49,353 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-06-12 22:21:49,353 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216738129] [2021-06-12 22:21:49,353 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 22:21:49,353 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:21:49,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 22:21:49,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-06-12 22:21:49,354 INFO L87 Difference]: Start difference. First operand 1529 states and 4378 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:50,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:21:50,092 INFO L93 Difference]: Finished difference Result 1873 states and 5237 transitions. [2021-06-12 22:21:50,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 22:21:50,092 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 22:21:50,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:21:50,094 INFO L225 Difference]: With dead ends: 1873 [2021-06-12 22:21:50,094 INFO L226 Difference]: Without dead ends: 1858 [2021-06-12 22:21:50,094 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 690.7ms TimeCoverageRelationStatistics Valid=168, Invalid=824, Unknown=0, NotChecked=0, Total=992 [2021-06-12 22:21:50,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1858 states. [2021-06-12 22:21:50,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1858 to 1523. [2021-06-12 22:21:50,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1523 states, 1522 states have (on average 2.862023653088042) internal successors, (4356), 1522 states have internal predecessors, (4356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:50,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1523 states to 1523 states and 4356 transitions. [2021-06-12 22:21:50,110 INFO L78 Accepts]: Start accepts. Automaton has 1523 states and 4356 transitions. Word has length 33 [2021-06-12 22:21:50,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:21:50,110 INFO L482 AbstractCegarLoop]: Abstraction has 1523 states and 4356 transitions. [2021-06-12 22:21:50,110 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:50,110 INFO L276 IsEmpty]: Start isEmpty. Operand 1523 states and 4356 transitions. [2021-06-12 22:21:50,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 22:21:50,112 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:21:50,112 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:21:50,312 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2021-06-12 22:21:50,312 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:21:50,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:21:50,313 INFO L82 PathProgramCache]: Analyzing trace with hash 2075345220, now seen corresponding path program 76 times [2021-06-12 22:21:50,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:21:50,313 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584863061] [2021-06-12 22:21:50,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:21:50,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:21:50,467 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:21:50,467 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:21:50,468 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584863061] [2021-06-12 22:21:50,468 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1584863061] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:21:50,468 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1973255231] [2021-06-12 22:21:50,468 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:21:50,510 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:21:50,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:21:50,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 22:21:50,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:21:50,722 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:21:50,722 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1973255231] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:21:50,722 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:21:50,722 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-12 22:21:50,722 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402101511] [2021-06-12 22:21:50,722 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 22:21:50,722 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:21:50,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 22:21:50,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-06-12 22:21:50,723 INFO L87 Difference]: Start difference. First operand 1523 states and 4356 transitions. Second operand has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 18 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:51,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:21:51,229 INFO L93 Difference]: Finished difference Result 2021 states and 5714 transitions. [2021-06-12 22:21:51,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 22:21:51,230 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 18 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 22:21:51,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:21:51,232 INFO L225 Difference]: With dead ends: 2021 [2021-06-12 22:21:51,232 INFO L226 Difference]: Without dead ends: 2002 [2021-06-12 22:21:51,232 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 469.0ms TimeCoverageRelationStatistics Valid=112, Invalid=488, Unknown=0, NotChecked=0, Total=600 [2021-06-12 22:21:51,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2002 states. [2021-06-12 22:21:51,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2002 to 1527. [2021-06-12 22:21:51,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1527 states, 1526 states have (on average 2.8610747051114025) internal successors, (4366), 1526 states have internal predecessors, (4366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:51,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1527 states to 1527 states and 4366 transitions. [2021-06-12 22:21:51,247 INFO L78 Accepts]: Start accepts. Automaton has 1527 states and 4366 transitions. Word has length 33 [2021-06-12 22:21:51,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:21:51,247 INFO L482 AbstractCegarLoop]: Abstraction has 1527 states and 4366 transitions. [2021-06-12 22:21:51,247 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 18 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:51,247 INFO L276 IsEmpty]: Start isEmpty. Operand 1527 states and 4366 transitions. [2021-06-12 22:21:51,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 22:21:51,248 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:21:51,248 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:21:51,449 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:21:51,449 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:21:51,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:21:51,449 INFO L82 PathProgramCache]: Analyzing trace with hash 1467907460, now seen corresponding path program 77 times [2021-06-12 22:21:51,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:21:51,449 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074118216] [2021-06-12 22:21:51,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:21:51,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:21:51,577 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:21:51,577 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:21:51,577 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074118216] [2021-06-12 22:21:51,577 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2074118216] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:21:51,577 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1908691507] [2021-06-12 22:21:51,578 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:21:51,607 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 22:21:51,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:21:51,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 22:21:51,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:21:51,837 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:21:51,837 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1908691507] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:21:51,837 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:21:51,837 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-12 22:21:51,837 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283661241] [2021-06-12 22:21:51,837 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 22:21:51,837 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:21:51,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 22:21:51,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-06-12 22:21:51,838 INFO L87 Difference]: Start difference. First operand 1527 states and 4366 transitions. Second operand has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 18 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:52,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:21:52,305 INFO L93 Difference]: Finished difference Result 2017 states and 5700 transitions. [2021-06-12 22:21:52,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 22:21:52,305 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 18 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 22:21:52,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:21:52,307 INFO L225 Difference]: With dead ends: 2017 [2021-06-12 22:21:52,307 INFO L226 Difference]: Without dead ends: 2002 [2021-06-12 22:21:52,308 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 447.9ms TimeCoverageRelationStatistics Valid=112, Invalid=488, Unknown=0, NotChecked=0, Total=600 [2021-06-12 22:21:52,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2002 states. [2021-06-12 22:21:52,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2002 to 1521. [2021-06-12 22:21:52,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1521 states, 1520 states have (on average 2.860526315789474) internal successors, (4348), 1520 states have internal predecessors, (4348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:52,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1521 states to 1521 states and 4348 transitions. [2021-06-12 22:21:52,322 INFO L78 Accepts]: Start accepts. Automaton has 1521 states and 4348 transitions. Word has length 33 [2021-06-12 22:21:52,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:21:52,322 INFO L482 AbstractCegarLoop]: Abstraction has 1521 states and 4348 transitions. [2021-06-12 22:21:52,322 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 18 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:52,322 INFO L276 IsEmpty]: Start isEmpty. Operand 1521 states and 4348 transitions. [2021-06-12 22:21:52,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 22:21:52,323 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:21:52,323 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:21:52,524 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-06-12 22:21:52,524 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:21:52,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:21:52,524 INFO L82 PathProgramCache]: Analyzing trace with hash 2005070232, now seen corresponding path program 78 times [2021-06-12 22:21:52,524 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:21:52,524 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769309630] [2021-06-12 22:21:52,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:21:52,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:21:52,663 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:21:52,664 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:21:52,664 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769309630] [2021-06-12 22:21:52,664 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1769309630] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:21:52,664 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1968159380] [2021-06-12 22:21:52,664 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:21:52,693 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-12 22:21:52,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:21:52,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 22:21:52,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:21:52,784 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-12 22:21:52,786 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:21:52,792 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:21:52,793 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:21:52,793 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:19 [2021-06-12 22:21:52,944 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:21:52,945 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1968159380] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:21:52,945 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:21:52,945 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-06-12 22:21:52,945 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475639909] [2021-06-12 22:21:52,945 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 22:21:52,945 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:21:52,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 22:21:52,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-06-12 22:21:52,945 INFO L87 Difference]: Start difference. First operand 1521 states and 4348 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:54,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:21:54,031 INFO L93 Difference]: Finished difference Result 2105 states and 5893 transitions. [2021-06-12 22:21:54,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-12 22:21:54,032 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 22:21:54,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:21:54,034 INFO L225 Difference]: With dead ends: 2105 [2021-06-12 22:21:54,034 INFO L226 Difference]: Without dead ends: 2075 [2021-06-12 22:21:54,034 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 371 ImplicationChecksByTransitivity, 1033.2ms TimeCoverageRelationStatistics Valid=260, Invalid=1300, Unknown=0, NotChecked=0, Total=1560 [2021-06-12 22:21:54,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2075 states. [2021-06-12 22:21:54,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2075 to 1529. [2021-06-12 22:21:54,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1529 states, 1528 states have (on average 2.863874345549738) internal successors, (4376), 1528 states have internal predecessors, (4376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:54,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1529 states to 1529 states and 4376 transitions. [2021-06-12 22:21:54,049 INFO L78 Accepts]: Start accepts. Automaton has 1529 states and 4376 transitions. Word has length 33 [2021-06-12 22:21:54,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:21:54,049 INFO L482 AbstractCegarLoop]: Abstraction has 1529 states and 4376 transitions. [2021-06-12 22:21:54,049 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:54,049 INFO L276 IsEmpty]: Start isEmpty. Operand 1529 states and 4376 transitions. [2021-06-12 22:21:54,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 22:21:54,050 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:21:54,050 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:21:54,250 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,78 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:21:54,251 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:21:54,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:21:54,251 INFO L82 PathProgramCache]: Analyzing trace with hash 1128887768, now seen corresponding path program 79 times [2021-06-12 22:21:54,251 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:21:54,251 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954060155] [2021-06-12 22:21:54,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:21:54,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:21:54,400 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:21:54,400 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:21:54,400 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954060155] [2021-06-12 22:21:54,400 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [954060155] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:21:54,400 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [172315946] [2021-06-12 22:21:54,400 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:21:54,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:21:54,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 22:21:54,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:21:54,644 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:21:54,644 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [172315946] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:21:54,644 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:21:54,644 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-12 22:21:54,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870519435] [2021-06-12 22:21:54,644 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 22:21:54,644 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:21:54,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 22:21:54,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-06-12 22:21:54,645 INFO L87 Difference]: Start difference. First operand 1529 states and 4376 transitions. Second operand has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 18 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:55,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:21:55,354 INFO L93 Difference]: Finished difference Result 2290 states and 6454 transitions. [2021-06-12 22:21:55,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 22:21:55,354 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 18 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 22:21:55,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:21:55,356 INFO L225 Difference]: With dead ends: 2290 [2021-06-12 22:21:55,356 INFO L226 Difference]: Without dead ends: 2271 [2021-06-12 22:21:55,356 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 625.5ms TimeCoverageRelationStatistics Valid=147, Invalid=723, Unknown=0, NotChecked=0, Total=870 [2021-06-12 22:21:55,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2271 states. [2021-06-12 22:21:55,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2271 to 1521. [2021-06-12 22:21:55,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1521 states, 1520 states have (on average 2.860526315789474) internal successors, (4348), 1520 states have internal predecessors, (4348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:55,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1521 states to 1521 states and 4348 transitions. [2021-06-12 22:21:55,372 INFO L78 Accepts]: Start accepts. Automaton has 1521 states and 4348 transitions. Word has length 33 [2021-06-12 22:21:55,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:21:55,372 INFO L482 AbstractCegarLoop]: Abstraction has 1521 states and 4348 transitions. [2021-06-12 22:21:55,372 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 18 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:55,372 INFO L276 IsEmpty]: Start isEmpty. Operand 1521 states and 4348 transitions. [2021-06-12 22:21:55,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 22:21:55,373 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:21:55,373 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:21:55,574 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:21:55,574 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:21:55,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:21:55,574 INFO L82 PathProgramCache]: Analyzing trace with hash -151026168, now seen corresponding path program 80 times [2021-06-12 22:21:55,574 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:21:55,574 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482953658] [2021-06-12 22:21:55,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:21:55,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:21:55,740 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:21:55,741 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:21:55,741 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482953658] [2021-06-12 22:21:55,741 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482953658] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:21:55,741 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1320567728] [2021-06-12 22:21:55,741 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:21:55,785 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:21:55,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:21:55,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 22:21:55,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:21:55,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-12 22:21:55,874 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:21:55,881 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:21:55,881 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:21:55,881 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:19 [2021-06-12 22:21:56,027 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:21:56,027 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1320567728] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:21:56,027 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:21:56,027 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-06-12 22:21:56,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948391840] [2021-06-12 22:21:56,028 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 22:21:56,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:21:56,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 22:21:56,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-06-12 22:21:56,028 INFO L87 Difference]: Start difference. First operand 1521 states and 4348 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:57,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:21:57,170 INFO L93 Difference]: Finished difference Result 2089 states and 5825 transitions. [2021-06-12 22:21:57,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-12 22:21:57,170 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 22:21:57,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:21:57,172 INFO L225 Difference]: With dead ends: 2089 [2021-06-12 22:21:57,172 INFO L226 Difference]: Without dead ends: 2059 [2021-06-12 22:21:57,173 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 371 ImplicationChecksByTransitivity, 1071.7ms TimeCoverageRelationStatistics Valid=260, Invalid=1300, Unknown=0, NotChecked=0, Total=1560 [2021-06-12 22:21:57,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2059 states. [2021-06-12 22:21:57,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2059 to 1533. [2021-06-12 22:21:57,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1533 states, 1532 states have (on average 2.862924281984334) internal successors, (4386), 1532 states have internal predecessors, (4386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:57,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1533 states to 1533 states and 4386 transitions. [2021-06-12 22:21:57,188 INFO L78 Accepts]: Start accepts. Automaton has 1533 states and 4386 transitions. Word has length 33 [2021-06-12 22:21:57,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:21:57,188 INFO L482 AbstractCegarLoop]: Abstraction has 1533 states and 4386 transitions. [2021-06-12 22:21:57,188 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:57,188 INFO L276 IsEmpty]: Start isEmpty. Operand 1533 states and 4386 transitions. [2021-06-12 22:21:57,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 22:21:57,190 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:21:57,190 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:21:57,390 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:21:57,390 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:21:57,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:21:57,391 INFO L82 PathProgramCache]: Analyzing trace with hash 1612643762, now seen corresponding path program 81 times [2021-06-12 22:21:57,391 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:21:57,391 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262693963] [2021-06-12 22:21:57,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:21:57,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:21:57,530 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:21:57,530 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:21:57,530 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262693963] [2021-06-12 22:21:57,530 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [262693963] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:21:57,530 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1624300451] [2021-06-12 22:21:57,530 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:21:57,570 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 22:21:57,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:21:57,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 22:21:57,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:21:57,803 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:21:57,804 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1624300451] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:21:57,804 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:21:57,804 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-06-12 22:21:57,804 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060505247] [2021-06-12 22:21:57,804 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 22:21:57,804 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:21:57,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 22:21:57,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-06-12 22:21:57,804 INFO L87 Difference]: Start difference. First operand 1533 states and 4386 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:58,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:21:58,436 INFO L93 Difference]: Finished difference Result 2274 states and 6386 transitions. [2021-06-12 22:21:58,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-12 22:21:58,437 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 22:21:58,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:21:58,439 INFO L225 Difference]: With dead ends: 2274 [2021-06-12 22:21:58,439 INFO L226 Difference]: Without dead ends: 2259 [2021-06-12 22:21:58,440 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 617.6ms TimeCoverageRelationStatistics Valid=168, Invalid=824, Unknown=0, NotChecked=0, Total=992 [2021-06-12 22:21:58,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2259 states. [2021-06-12 22:21:58,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2259 to 1519. [2021-06-12 22:21:58,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1519 states, 1518 states have (on average 2.86034255599473) internal successors, (4342), 1518 states have internal predecessors, (4342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:58,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1519 states to 1519 states and 4342 transitions. [2021-06-12 22:21:58,456 INFO L78 Accepts]: Start accepts. Automaton has 1519 states and 4342 transitions. Word has length 33 [2021-06-12 22:21:58,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:21:58,456 INFO L482 AbstractCegarLoop]: Abstraction has 1519 states and 4342 transitions. [2021-06-12 22:21:58,456 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:58,456 INFO L276 IsEmpty]: Start isEmpty. Operand 1519 states and 4342 transitions. [2021-06-12 22:21:58,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 22:21:58,457 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:21:58,458 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:21:58,658 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:21:58,658 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:21:58,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:21:58,658 INFO L82 PathProgramCache]: Analyzing trace with hash 1066945510, now seen corresponding path program 82 times [2021-06-12 22:21:58,658 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:21:58,659 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139993419] [2021-06-12 22:21:58,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:21:58,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:21:58,797 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:21:58,797 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:21:58,797 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139993419] [2021-06-12 22:21:58,797 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1139993419] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:21:58,797 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1825314543] [2021-06-12 22:21:58,797 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:21:58,835 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:21:58,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:21:58,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 22:21:58,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:21:59,058 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:21:59,059 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1825314543] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:21:59,059 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:21:59,059 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-12 22:21:59,059 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078710361] [2021-06-12 22:21:59,059 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 22:21:59,059 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:21:59,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 22:21:59,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-12 22:21:59,059 INFO L87 Difference]: Start difference. First operand 1519 states and 4342 transitions. Second operand has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 18 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:00,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:22:00,071 INFO L93 Difference]: Finished difference Result 2065 states and 5781 transitions. [2021-06-12 22:22:00,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-12 22:22:00,071 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 18 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 22:22:00,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:22:00,073 INFO L225 Difference]: With dead ends: 2065 [2021-06-12 22:22:00,074 INFO L226 Difference]: Without dead ends: 2050 [2021-06-12 22:22:00,074 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 839.7ms TimeCoverageRelationStatistics Valid=180, Invalid=876, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 22:22:00,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2050 states. [2021-06-12 22:22:00,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2050 to 1523. [2021-06-12 22:22:00,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1523 states, 1522 states have (on average 2.863337713534823) internal successors, (4358), 1522 states have internal predecessors, (4358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:00,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1523 states to 1523 states and 4358 transitions. [2021-06-12 22:22:00,090 INFO L78 Accepts]: Start accepts. Automaton has 1523 states and 4358 transitions. Word has length 33 [2021-06-12 22:22:00,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:22:00,090 INFO L482 AbstractCegarLoop]: Abstraction has 1523 states and 4358 transitions. [2021-06-12 22:22:00,090 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 18 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:00,090 INFO L276 IsEmpty]: Start isEmpty. Operand 1523 states and 4358 transitions. [2021-06-12 22:22:00,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 22:22:00,092 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:22:00,092 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:22:00,308 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:22:00,308 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:22:00,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:22:00,308 INFO L82 PathProgramCache]: Analyzing trace with hash 190763046, now seen corresponding path program 83 times [2021-06-12 22:22:00,308 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:22:00,309 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405775898] [2021-06-12 22:22:00,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:22:00,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:22:00,444 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:22:00,444 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:22:00,444 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405775898] [2021-06-12 22:22:00,444 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405775898] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:22:00,444 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1891549551] [2021-06-12 22:22:00,445 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:22:00,476 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:22:00,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:22:00,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 22:22:00,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:22:00,690 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:22:00,690 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1891549551] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:22:00,690 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:22:00,690 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-12 22:22:00,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462735752] [2021-06-12 22:22:00,690 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 22:22:00,690 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:22:00,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 22:22:00,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-06-12 22:22:00,691 INFO L87 Difference]: Start difference. First operand 1523 states and 4358 transitions. Second operand has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 18 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:01,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:22:01,399 INFO L93 Difference]: Finished difference Result 2437 states and 6835 transitions. [2021-06-12 22:22:01,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 22:22:01,399 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 18 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 22:22:01,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:22:01,402 INFO L225 Difference]: With dead ends: 2437 [2021-06-12 22:22:01,402 INFO L226 Difference]: Without dead ends: 2418 [2021-06-12 22:22:01,402 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 626.4ms TimeCoverageRelationStatistics Valid=145, Invalid=725, Unknown=0, NotChecked=0, Total=870 [2021-06-12 22:22:01,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2418 states. [2021-06-12 22:22:01,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2418 to 1511. [2021-06-12 22:22:01,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1511 states, 1510 states have (on average 2.8596026490066224) internal successors, (4318), 1510 states have internal predecessors, (4318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:01,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1511 states to 1511 states and 4318 transitions. [2021-06-12 22:22:01,419 INFO L78 Accepts]: Start accepts. Automaton has 1511 states and 4318 transitions. Word has length 33 [2021-06-12 22:22:01,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:22:01,419 INFO L482 AbstractCegarLoop]: Abstraction has 1511 states and 4318 transitions. [2021-06-12 22:22:01,419 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 18 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:01,419 INFO L276 IsEmpty]: Start isEmpty. Operand 1511 states and 4318 transitions. [2021-06-12 22:22:01,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 22:22:01,420 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:22:01,421 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:22:01,621 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:22:01,621 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:22:01,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:22:01,621 INFO L82 PathProgramCache]: Analyzing trace with hash 2060271940, now seen corresponding path program 84 times [2021-06-12 22:22:01,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:22:01,621 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287366835] [2021-06-12 22:22:01,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:22:01,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:22:01,758 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:22:01,758 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:22:01,758 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287366835] [2021-06-12 22:22:01,759 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1287366835] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:22:01,759 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2035620883] [2021-06-12 22:22:01,759 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:22:01,803 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-12 22:22:01,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:22:01,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 22:22:01,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:22:01,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-12 22:22:01,893 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:22:01,899 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:22:01,900 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:22:01,900 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:19 [2021-06-12 22:22:02,048 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:22:02,048 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2035620883] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:22:02,048 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:22:02,048 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-06-12 22:22:02,048 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734696372] [2021-06-12 22:22:02,048 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 22:22:02,048 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:22:02,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 22:22:02,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-06-12 22:22:02,049 INFO L87 Difference]: Start difference. First operand 1511 states and 4318 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:03,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:22:03,114 INFO L93 Difference]: Finished difference Result 2034 states and 5661 transitions. [2021-06-12 22:22:03,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-12 22:22:03,115 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 22:22:03,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:22:03,117 INFO L225 Difference]: With dead ends: 2034 [2021-06-12 22:22:03,117 INFO L226 Difference]: Without dead ends: 2019 [2021-06-12 22:22:03,117 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 347 ImplicationChecksByTransitivity, 1018.8ms TimeCoverageRelationStatistics Valid=251, Invalid=1231, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 22:22:03,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2019 states. [2021-06-12 22:22:03,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2019 to 1517. [2021-06-12 22:22:03,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1517 states, 1516 states have (on average 2.862796833773087) internal successors, (4340), 1516 states have internal predecessors, (4340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:03,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1517 states to 1517 states and 4340 transitions. [2021-06-12 22:22:03,133 INFO L78 Accepts]: Start accepts. Automaton has 1517 states and 4340 transitions. Word has length 33 [2021-06-12 22:22:03,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:22:03,133 INFO L482 AbstractCegarLoop]: Abstraction has 1517 states and 4340 transitions. [2021-06-12 22:22:03,133 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:03,133 INFO L276 IsEmpty]: Start isEmpty. Operand 1517 states and 4340 transitions. [2021-06-12 22:22:03,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 22:22:03,134 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:22:03,134 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:22:03,334 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:22:03,335 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:22:03,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:22:03,335 INFO L82 PathProgramCache]: Analyzing trace with hash -471025426, now seen corresponding path program 85 times [2021-06-12 22:22:03,335 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:22:03,335 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136923768] [2021-06-12 22:22:03,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:22:03,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:22:03,484 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:22:03,484 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:22:03,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136923768] [2021-06-12 22:22:03,484 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136923768] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:22:03,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [892332837] [2021-06-12 22:22:03,484 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:22:03,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:22:03,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 22:22:03,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:22:03,725 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:22:03,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [892332837] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:22:03,725 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:22:03,726 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-12 22:22:03,726 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223052172] [2021-06-12 22:22:03,726 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 22:22:03,726 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:22:03,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 22:22:03,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-06-12 22:22:03,726 INFO L87 Difference]: Start difference. First operand 1517 states and 4340 transitions. Second operand has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 18 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:04,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:22:04,364 INFO L93 Difference]: Finished difference Result 2295 states and 6421 transitions. [2021-06-12 22:22:04,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 22:22:04,364 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 18 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 22:22:04,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:22:04,366 INFO L225 Difference]: With dead ends: 2295 [2021-06-12 22:22:04,366 INFO L226 Difference]: Without dead ends: 2280 [2021-06-12 22:22:04,367 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 610.5ms TimeCoverageRelationStatistics Valid=139, Invalid=673, Unknown=0, NotChecked=0, Total=812 [2021-06-12 22:22:04,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2280 states. [2021-06-12 22:22:04,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2280 to 1450. [2021-06-12 22:22:04,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1450 states, 1449 states have (on average 2.8612836438923397) internal successors, (4146), 1449 states have internal predecessors, (4146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:04,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1450 states to 1450 states and 4146 transitions. [2021-06-12 22:22:04,382 INFO L78 Accepts]: Start accepts. Automaton has 1450 states and 4146 transitions. Word has length 33 [2021-06-12 22:22:04,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:22:04,382 INFO L482 AbstractCegarLoop]: Abstraction has 1450 states and 4146 transitions. [2021-06-12 22:22:04,382 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 18 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:04,382 INFO L276 IsEmpty]: Start isEmpty. Operand 1450 states and 4146 transitions. [2021-06-12 22:22:04,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-12 22:22:04,383 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:22:04,383 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:22:04,595 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2021-06-12 22:22:04,595 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:22:04,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:22:04,596 INFO L82 PathProgramCache]: Analyzing trace with hash -281359094, now seen corresponding path program 1 times [2021-06-12 22:22:04,596 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:22:04,596 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085115248] [2021-06-12 22:22:04,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:22:04,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:22:04,611 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:22:04,611 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:22:04,611 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085115248] [2021-06-12 22:22:04,611 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2085115248] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:22:04,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1302695285] [2021-06-12 22:22:04,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:22:04,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:22:04,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-12 22:22:04,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:22:04,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:22:04,661 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:22:04,662 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:22:04,662 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:22:04,662 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-06-12 22:22:04,682 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:22:04,682 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1302695285] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:22:04,682 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:22:04,682 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-12 22:22:04,682 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658343276] [2021-06-12 22:22:04,683 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-12 22:22:04,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:22:04,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-12 22:22:04,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-12 22:22:04,683 INFO L87 Difference]: Start difference. First operand 1450 states and 4146 transitions. Second operand has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:04,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:22:04,754 INFO L93 Difference]: Finished difference Result 1940 states and 5616 transitions. [2021-06-12 22:22:04,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 22:22:04,755 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-12 22:22:04,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:22:04,756 INFO L225 Difference]: With dead ends: 1940 [2021-06-12 22:22:04,756 INFO L226 Difference]: Without dead ends: 1940 [2021-06-12 22:22:04,757 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 38.4ms TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-06-12 22:22:04,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1940 states. [2021-06-12 22:22:04,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1940 to 1810. [2021-06-12 22:22:04,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1810 states, 1809 states have (on average 2.902155887230514) internal successors, (5250), 1809 states have internal predecessors, (5250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:04,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1810 states to 1810 states and 5250 transitions. [2021-06-12 22:22:04,773 INFO L78 Accepts]: Start accepts. Automaton has 1810 states and 5250 transitions. Word has length 37 [2021-06-12 22:22:04,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:22:04,773 INFO L482 AbstractCegarLoop]: Abstraction has 1810 states and 5250 transitions. [2021-06-12 22:22:04,773 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:04,773 INFO L276 IsEmpty]: Start isEmpty. Operand 1810 states and 5250 transitions. [2021-06-12 22:22:04,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-06-12 22:22:04,774 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:22:04,774 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:22:04,975 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:22:04,975 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:22:04,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:22:04,975 INFO L82 PathProgramCache]: Analyzing trace with hash -1657737362, now seen corresponding path program 86 times [2021-06-12 22:22:04,975 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:22:04,975 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400318521] [2021-06-12 22:22:04,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:22:04,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:22:04,991 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:22:04,991 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:22:04,991 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400318521] [2021-06-12 22:22:04,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [400318521] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:22:04,991 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1482618555] [2021-06-12 22:22:04,991 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:22:05,022 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:22:05,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:22:05,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-12 22:22:05,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:22:05,066 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:22:05,066 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1482618555] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:22:05,066 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:22:05,066 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 4 [2021-06-12 22:22:05,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195964462] [2021-06-12 22:22:05,066 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-12 22:22:05,066 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:22:05,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-12 22:22:05,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-12 22:22:05,067 INFO L87 Difference]: Start difference. First operand 1810 states and 5250 transitions. Second operand has 5 states, 5 states have (on average 10.2) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:05,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:22:05,078 INFO L93 Difference]: Finished difference Result 2953 states and 8537 transitions. [2021-06-12 22:22:05,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-12 22:22:05,078 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-06-12 22:22:05,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:22:05,081 INFO L225 Difference]: With dead ends: 2953 [2021-06-12 22:22:05,081 INFO L226 Difference]: Without dead ends: 2856 [2021-06-12 22:22:05,081 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.9ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-12 22:22:05,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2856 states. [2021-06-12 22:22:05,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2856 to 2284. [2021-06-12 22:22:05,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2284 states, 2283 states have (on average 2.9890494962768286) internal successors, (6824), 2283 states have internal predecessors, (6824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:05,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2284 states to 2284 states and 6824 transitions. [2021-06-12 22:22:05,104 INFO L78 Accepts]: Start accepts. Automaton has 2284 states and 6824 transitions. Word has length 38 [2021-06-12 22:22:05,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:22:05,104 INFO L482 AbstractCegarLoop]: Abstraction has 2284 states and 6824 transitions. [2021-06-12 22:22:05,104 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:05,104 INFO L276 IsEmpty]: Start isEmpty. Operand 2284 states and 6824 transitions. [2021-06-12 22:22:05,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-12 22:22:05,106 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:22:05,106 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:22:05,306 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2021-06-12 22:22:05,307 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:22:05,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:22:05,307 INFO L82 PathProgramCache]: Analyzing trace with hash 70559810, now seen corresponding path program 87 times [2021-06-12 22:22:05,307 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:22:05,307 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778484491] [2021-06-12 22:22:05,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:22:05,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:22:05,324 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:22:05,324 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:22:05,324 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778484491] [2021-06-12 22:22:05,324 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1778484491] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:22:05,324 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [627211090] [2021-06-12 22:22:05,324 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:22:05,355 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 22:22:05,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:22:05,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-12 22:22:05,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:22:05,412 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 22:22:05,412 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [627211090] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 22:22:05,412 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-06-12 22:22:05,412 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2021-06-12 22:22:05,412 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367793605] [2021-06-12 22:22:05,413 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-12 22:22:05,413 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:22:05,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-12 22:22:05,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-12 22:22:05,413 INFO L87 Difference]: Start difference. First operand 2284 states and 6824 transitions. Second operand has 4 states, 4 states have (on average 9.5) internal successors, (38), 3 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:05,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:22:05,453 INFO L93 Difference]: Finished difference Result 6496 states and 19271 transitions. [2021-06-12 22:22:05,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-12 22:22:05,454 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 3 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-12 22:22:05,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:22:05,461 INFO L225 Difference]: With dead ends: 6496 [2021-06-12 22:22:05,461 INFO L226 Difference]: Without dead ends: 6091 [2021-06-12 22:22:05,462 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.7ms TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-12 22:22:05,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6091 states. [2021-06-12 22:22:05,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6091 to 5331. [2021-06-12 22:22:05,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5331 states, 5330 states have (on average 3.052908067542214) internal successors, (16272), 5330 states have internal predecessors, (16272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:05,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5331 states to 5331 states and 16272 transitions. [2021-06-12 22:22:05,546 INFO L78 Accepts]: Start accepts. Automaton has 5331 states and 16272 transitions. Word has length 39 [2021-06-12 22:22:05,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:22:05,546 INFO L482 AbstractCegarLoop]: Abstraction has 5331 states and 16272 transitions. [2021-06-12 22:22:05,546 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 3 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:05,546 INFO L276 IsEmpty]: Start isEmpty. Operand 5331 states and 16272 transitions. [2021-06-12 22:22:05,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-12 22:22:05,551 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:22:05,551 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:22:05,752 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:22:05,752 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:22:05,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:22:05,752 INFO L82 PathProgramCache]: Analyzing trace with hash -1268569178, now seen corresponding path program 2 times [2021-06-12 22:22:05,752 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:22:05,752 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956193524] [2021-06-12 22:22:05,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:22:05,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:22:05,793 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:22:05,793 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:22:05,793 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956193524] [2021-06-12 22:22:05,793 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1956193524] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:22:05,793 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331107116] [2021-06-12 22:22:05,793 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:22:05,824 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:22:05,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:22:05,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 22:22:05,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:22:05,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:22:05,849 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:22:05,851 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:22:05,852 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:22:05,852 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:14, output treesize:7 [2021-06-12 22:22:05,872 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:22:05,873 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:22:05,874 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:22:05,874 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:22:05,874 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-06-12 22:22:05,898 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:22:05,898 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [331107116] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:22:05,898 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:22:05,898 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2021-06-12 22:22:05,898 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781125276] [2021-06-12 22:22:05,898 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 22:22:05,898 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:22:05,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 22:22:05,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-06-12 22:22:05,898 INFO L87 Difference]: Start difference. First operand 5331 states and 16272 transitions. Second operand has 11 states, 11 states have (on average 5.0) internal successors, (55), 10 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:06,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:22:06,048 INFO L93 Difference]: Finished difference Result 7486 states and 22666 transitions. [2021-06-12 22:22:06,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 22:22:06,049 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.0) internal successors, (55), 10 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-12 22:22:06,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:22:06,057 INFO L225 Difference]: With dead ends: 7486 [2021-06-12 22:22:06,057 INFO L226 Difference]: Without dead ends: 7486 [2021-06-12 22:22:06,057 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 78.0ms TimeCoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-06-12 22:22:06,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7486 states. [2021-06-12 22:22:06,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7486 to 6990. [2021-06-12 22:22:06,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6990 states, 6989 states have (on average 3.0479324653026185) internal successors, (21302), 6989 states have internal predecessors, (21302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:06,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6990 states to 6990 states and 21302 transitions. [2021-06-12 22:22:06,149 INFO L78 Accepts]: Start accepts. Automaton has 6990 states and 21302 transitions. Word has length 43 [2021-06-12 22:22:06,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:22:06,150 INFO L482 AbstractCegarLoop]: Abstraction has 6990 states and 21302 transitions. [2021-06-12 22:22:06,150 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.0) internal successors, (55), 10 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:06,150 INFO L276 IsEmpty]: Start isEmpty. Operand 6990 states and 21302 transitions. [2021-06-12 22:22:06,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-12 22:22:06,157 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:22:06,157 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:22:06,372 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:22:06,373 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:22:06,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:22:06,373 INFO L82 PathProgramCache]: Analyzing trace with hash 1230725176, now seen corresponding path program 3 times [2021-06-12 22:22:06,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:22:06,373 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772498010] [2021-06-12 22:22:06,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:22:06,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:22:06,847 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:22:06,847 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:22:06,847 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772498010] [2021-06-12 22:22:06,847 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1772498010] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:22:06,847 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1479343002] [2021-06-12 22:22:06,847 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:22:06,882 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 22:22:06,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:22:06,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-12 22:22:06,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:22:07,057 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:22:07,058 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:22:07,076 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:22:07,076 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:22:07,077 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-12 22:22:07,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:22:07,229 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:22:07,240 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:22:07,241 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:22:07,241 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-06-12 22:22:07,701 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:22:07,702 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1479343002] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:22:07,702 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:22:07,702 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-12 22:22:07,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097998280] [2021-06-12 22:22:07,702 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-12 22:22:07,702 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:22:07,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-12 22:22:07,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1364, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 22:22:07,702 INFO L87 Difference]: Start difference. First operand 6990 states and 21302 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:09,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:22:09,791 INFO L93 Difference]: Finished difference Result 9371 states and 28152 transitions. [2021-06-12 22:22:09,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-12 22:22:09,792 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-12 22:22:09,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:22:09,803 INFO L225 Difference]: With dead ends: 9371 [2021-06-12 22:22:09,803 INFO L226 Difference]: Without dead ends: 9227 [2021-06-12 22:22:09,803 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 903 ImplicationChecksByTransitivity, 1883.2ms TimeCoverageRelationStatistics Valid=260, Invalid=3280, Unknown=0, NotChecked=0, Total=3540 [2021-06-12 22:22:09,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9227 states. [2021-06-12 22:22:09,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9227 to 7110. [2021-06-12 22:22:09,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7110 states, 7109 states have (on average 3.039668026445351) internal successors, (21609), 7109 states have internal predecessors, (21609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:09,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7110 states to 7110 states and 21609 transitions. [2021-06-12 22:22:09,900 INFO L78 Accepts]: Start accepts. Automaton has 7110 states and 21609 transitions. Word has length 48 [2021-06-12 22:22:09,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:22:09,900 INFO L482 AbstractCegarLoop]: Abstraction has 7110 states and 21609 transitions. [2021-06-12 22:22:09,900 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:09,900 INFO L276 IsEmpty]: Start isEmpty. Operand 7110 states and 21609 transitions. [2021-06-12 22:22:09,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-12 22:22:09,907 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:22:09,908 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:22:10,116 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:22:10,117 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:22:10,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:22:10,117 INFO L82 PathProgramCache]: Analyzing trace with hash 1338175544, now seen corresponding path program 4 times [2021-06-12 22:22:10,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:22:10,118 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241916052] [2021-06-12 22:22:10,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:22:10,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:22:10,576 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:22:10,576 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:22:10,577 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241916052] [2021-06-12 22:22:10,577 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241916052] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:22:10,577 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [13803916] [2021-06-12 22:22:10,577 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:22:10,609 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:22:10,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:22:10,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-12 22:22:10,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:22:10,770 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:22:10,771 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:22:10,783 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:22:10,784 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:22:10,784 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-12 22:22:10,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-12 22:22:10,937 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:22:10,948 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:22:10,948 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:22:10,948 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:32 [2021-06-12 22:22:11,379 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:22:11,380 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [13803916] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:22:11,380 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:22:11,380 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-12 22:22:11,380 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20888781] [2021-06-12 22:22:11,380 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-12 22:22:11,380 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:22:11,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-12 22:22:11,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1366, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 22:22:11,380 INFO L87 Difference]: Start difference. First operand 7110 states and 21609 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:13,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:22:13,505 INFO L93 Difference]: Finished difference Result 8118 states and 24576 transitions. [2021-06-12 22:22:13,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-12 22:22:13,506 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-12 22:22:13,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:22:13,515 INFO L225 Difference]: With dead ends: 8118 [2021-06-12 22:22:13,516 INFO L226 Difference]: Without dead ends: 8078 [2021-06-12 22:22:13,516 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 940 ImplicationChecksByTransitivity, 2141.1ms TimeCoverageRelationStatistics Valid=299, Invalid=3483, Unknown=0, NotChecked=0, Total=3782 [2021-06-12 22:22:13,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8078 states. [2021-06-12 22:22:13,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8078 to 7122. [2021-06-12 22:22:13,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7122 states, 7121 states have (on average 3.0386181716051115) internal successors, (21638), 7121 states have internal predecessors, (21638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:13,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7122 states to 7122 states and 21638 transitions. [2021-06-12 22:22:13,599 INFO L78 Accepts]: Start accepts. Automaton has 7122 states and 21638 transitions. Word has length 48 [2021-06-12 22:22:13,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:22:13,599 INFO L482 AbstractCegarLoop]: Abstraction has 7122 states and 21638 transitions. [2021-06-12 22:22:13,599 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:13,599 INFO L276 IsEmpty]: Start isEmpty. Operand 7122 states and 21638 transitions. [2021-06-12 22:22:13,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-12 22:22:13,606 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:22:13,606 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:22:13,806 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:22:13,807 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:22:13,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:22:13,807 INFO L82 PathProgramCache]: Analyzing trace with hash 461993080, now seen corresponding path program 5 times [2021-06-12 22:22:13,807 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:22:13,807 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588192102] [2021-06-12 22:22:13,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:22:13,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:22:14,279 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:22:14,279 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:22:14,279 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588192102] [2021-06-12 22:22:14,280 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [588192102] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:22:14,280 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [427387061] [2021-06-12 22:22:14,280 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:22:14,313 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 22:22:14,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:22:14,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-12 22:22:14,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:22:14,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:22:14,440 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:22:14,452 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:22:14,452 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:22:14,453 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-12 22:22:14,639 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:22:14,640 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:22:14,653 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:22:14,654 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:22:14,654 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-06-12 22:22:15,055 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:22:15,056 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [427387061] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:22:15,056 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:22:15,056 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-12 22:22:15,056 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543557551] [2021-06-12 22:22:15,056 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-12 22:22:15,056 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:22:15,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-12 22:22:15,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1364, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 22:22:15,056 INFO L87 Difference]: Start difference. First operand 7122 states and 21638 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:17,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:22:17,007 INFO L93 Difference]: Finished difference Result 9329 states and 28070 transitions. [2021-06-12 22:22:17,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-12 22:22:17,007 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-12 22:22:17,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:22:17,018 INFO L225 Difference]: With dead ends: 9329 [2021-06-12 22:22:17,018 INFO L226 Difference]: Without dead ends: 9290 [2021-06-12 22:22:17,018 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 899 ImplicationChecksByTransitivity, 1902.4ms TimeCoverageRelationStatistics Valid=261, Invalid=3279, Unknown=0, NotChecked=0, Total=3540 [2021-06-12 22:22:17,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9290 states. [2021-06-12 22:22:17,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9290 to 7118. [2021-06-12 22:22:17,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7118 states, 7117 states have (on average 3.038780384993677) internal successors, (21627), 7117 states have internal predecessors, (21627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:17,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7118 states to 7118 states and 21627 transitions. [2021-06-12 22:22:17,110 INFO L78 Accepts]: Start accepts. Automaton has 7118 states and 21627 transitions. Word has length 48 [2021-06-12 22:22:17,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:22:17,111 INFO L482 AbstractCegarLoop]: Abstraction has 7118 states and 21627 transitions. [2021-06-12 22:22:17,111 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:17,111 INFO L276 IsEmpty]: Start isEmpty. Operand 7118 states and 21627 transitions. [2021-06-12 22:22:17,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-12 22:22:17,118 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:22:17,118 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:22:17,318 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable94 [2021-06-12 22:22:17,318 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:22:17,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:22:17,318 INFO L82 PathProgramCache]: Analyzing trace with hash 603708220, now seen corresponding path program 6 times [2021-06-12 22:22:17,319 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:22:17,319 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190553360] [2021-06-12 22:22:17,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:22:17,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:22:17,827 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:22:17,827 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:22:17,827 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190553360] [2021-06-12 22:22:17,827 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [190553360] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:22:17,827 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [850427814] [2021-06-12 22:22:17,827 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:22:17,861 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 22:22:17,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:22:17,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 44 conjunts are in the unsatisfiable core [2021-06-12 22:22:17,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:22:17,986 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:22:17,987 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:22:17,999 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:22:18,000 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:22:18,000 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-12 22:22:18,242 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:22:18,243 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:22:18,257 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:22:18,258 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:22:18,258 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-06-12 22:22:18,822 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:22:18,823 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [850427814] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:22:18,823 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:22:18,823 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22] total 40 [2021-06-12 22:22:18,823 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240916715] [2021-06-12 22:22:18,823 INFO L462 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-06-12 22:22:18,823 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:22:18,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-06-12 22:22:18,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=1512, Unknown=0, NotChecked=0, Total=1640 [2021-06-12 22:22:18,824 INFO L87 Difference]: Start difference. First operand 7118 states and 21627 transitions. Second operand has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:20,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:22:20,726 INFO L93 Difference]: Finished difference Result 9350 states and 28063 transitions. [2021-06-12 22:22:20,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-12 22:22:20,726 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-12 22:22:20,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:22:20,738 INFO L225 Difference]: With dead ends: 9350 [2021-06-12 22:22:20,739 INFO L226 Difference]: Without dead ends: 9293 [2021-06-12 22:22:20,739 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 972 ImplicationChecksByTransitivity, 2076.8ms TimeCoverageRelationStatistics Valid=271, Invalid=3389, Unknown=0, NotChecked=0, Total=3660 [2021-06-12 22:22:20,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9293 states. [2021-06-12 22:22:20,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9293 to 7124. [2021-06-12 22:22:20,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7124 states, 7123 states have (on average 3.0380457672329073) internal successors, (21640), 7123 states have internal predecessors, (21640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:20,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7124 states to 7124 states and 21640 transitions. [2021-06-12 22:22:20,836 INFO L78 Accepts]: Start accepts. Automaton has 7124 states and 21640 transitions. Word has length 48 [2021-06-12 22:22:20,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:22:20,836 INFO L482 AbstractCegarLoop]: Abstraction has 7124 states and 21640 transitions. [2021-06-12 22:22:20,836 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:20,836 INFO L276 IsEmpty]: Start isEmpty. Operand 7124 states and 21640 transitions. [2021-06-12 22:22:20,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-12 22:22:20,843 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:22:20,843 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:22:21,043 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:22:21,044 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:22:21,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:22:21,044 INFO L82 PathProgramCache]: Analyzing trace with hash -679439240, now seen corresponding path program 7 times [2021-06-12 22:22:21,044 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:22:21,044 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657705395] [2021-06-12 22:22:21,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:22:21,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:22:21,474 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:22:21,475 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:22:21,475 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657705395] [2021-06-12 22:22:21,475 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1657705395] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:22:21,475 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [15311330] [2021-06-12 22:22:21,475 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:22:21,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:22:21,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-12 22:22:21,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:22:21,633 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:22:21,634 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:22:21,646 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:22:21,646 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:22:21,647 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-12 22:22:21,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-12 22:22:21,846 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:22:21,858 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:22:21,859 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:22:21,859 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:32 [2021-06-12 22:22:22,268 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:22:22,269 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [15311330] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:22:22,269 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:22:22,269 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-12 22:22:22,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849199825] [2021-06-12 22:22:22,269 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-12 22:22:22,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:22:22,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-12 22:22:22,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1364, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 22:22:22,269 INFO L87 Difference]: Start difference. First operand 7124 states and 21640 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:23,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:22:23,915 INFO L93 Difference]: Finished difference Result 9305 states and 27967 transitions. [2021-06-12 22:22:23,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-12 22:22:23,915 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-12 22:22:23,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:22:23,926 INFO L225 Difference]: With dead ends: 9305 [2021-06-12 22:22:23,926 INFO L226 Difference]: Without dead ends: 9211 [2021-06-12 22:22:23,927 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 866 ImplicationChecksByTransitivity, 1787.9ms TimeCoverageRelationStatistics Valid=255, Invalid=3167, Unknown=0, NotChecked=0, Total=3422 [2021-06-12 22:22:23,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9211 states. [2021-06-12 22:22:24,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9211 to 7104. [2021-06-12 22:22:24,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7104 states, 7103 states have (on average 3.040546248064198) internal successors, (21597), 7103 states have internal predecessors, (21597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:24,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7104 states to 7104 states and 21597 transitions. [2021-06-12 22:22:24,025 INFO L78 Accepts]: Start accepts. Automaton has 7104 states and 21597 transitions. Word has length 48 [2021-06-12 22:22:24,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:22:24,025 INFO L482 AbstractCegarLoop]: Abstraction has 7104 states and 21597 transitions. [2021-06-12 22:22:24,025 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:24,025 INFO L276 IsEmpty]: Start isEmpty. Operand 7104 states and 21597 transitions. [2021-06-12 22:22:24,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-12 22:22:24,032 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:22:24,032 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:22:24,232 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable96 [2021-06-12 22:22:24,232 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:22:24,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:22:24,233 INFO L82 PathProgramCache]: Analyzing trace with hash 274230392, now seen corresponding path program 8 times [2021-06-12 22:22:24,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:22:24,233 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088874031] [2021-06-12 22:22:24,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:22:24,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:22:24,642 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:22:24,642 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:22:24,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088874031] [2021-06-12 22:22:24,642 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1088874031] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:22:24,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [29910480] [2021-06-12 22:22:24,643 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:22:24,680 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:22:24,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:22:24,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-12 22:22:24,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:22:24,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-12 22:22:24,817 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:22:24,829 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:22:24,829 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:22:24,829 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:31 [2021-06-12 22:22:24,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:22:24,983 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:22:24,994 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:22:24,995 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:22:24,995 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-06-12 22:22:25,518 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:22:25,518 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [29910480] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:22:25,519 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:22:25,519 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22] total 40 [2021-06-12 22:22:25,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405022847] [2021-06-12 22:22:25,519 INFO L462 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-06-12 22:22:25,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:22:25,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-06-12 22:22:25,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=1509, Unknown=0, NotChecked=0, Total=1640 [2021-06-12 22:22:25,519 INFO L87 Difference]: Start difference. First operand 7104 states and 21597 transitions. Second operand has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:27,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:22:27,486 INFO L93 Difference]: Finished difference Result 9451 states and 28333 transitions. [2021-06-12 22:22:27,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-12 22:22:27,486 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-12 22:22:27,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:22:27,498 INFO L225 Difference]: With dead ends: 9451 [2021-06-12 22:22:27,498 INFO L226 Difference]: Without dead ends: 9307 [2021-06-12 22:22:27,498 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1035 ImplicationChecksByTransitivity, 1986.4ms TimeCoverageRelationStatistics Valid=288, Invalid=3618, Unknown=0, NotChecked=0, Total=3906 [2021-06-12 22:22:27,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9307 states. [2021-06-12 22:22:27,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9307 to 7164. [2021-06-12 22:22:27,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7164 states, 7163 states have (on average 3.034063939690074) internal successors, (21733), 7163 states have internal predecessors, (21733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:27,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7164 states to 7164 states and 21733 transitions. [2021-06-12 22:22:27,598 INFO L78 Accepts]: Start accepts. Automaton has 7164 states and 21733 transitions. Word has length 48 [2021-06-12 22:22:27,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:22:27,598 INFO L482 AbstractCegarLoop]: Abstraction has 7164 states and 21733 transitions. [2021-06-12 22:22:27,598 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:27,598 INFO L276 IsEmpty]: Start isEmpty. Operand 7164 states and 21733 transitions. [2021-06-12 22:22:27,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-12 22:22:27,605 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:22:27,606 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:22:27,807 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:22:27,807 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:22:27,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:22:27,807 INFO L82 PathProgramCache]: Analyzing trace with hash 300299268, now seen corresponding path program 9 times [2021-06-12 22:22:27,807 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:22:27,807 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992026643] [2021-06-12 22:22:27,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:22:27,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:22:28,236 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:22:28,236 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:22:28,236 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992026643] [2021-06-12 22:22:28,236 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1992026643] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:22:28,236 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1173682028] [2021-06-12 22:22:28,236 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:22:28,270 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 22:22:28,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:22:28,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-12 22:22:28,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:22:28,396 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:22:28,397 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:22:28,409 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:22:28,410 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:22:28,410 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-12 22:22:28,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:22:28,603 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:22:28,614 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:22:28,614 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:22:28,614 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-06-12 22:22:29,028 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:22:29,028 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1173682028] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:22:29,028 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:22:29,028 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-12 22:22:29,029 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974076711] [2021-06-12 22:22:29,029 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-12 22:22:29,029 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:22:29,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-12 22:22:29,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1366, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 22:22:29,029 INFO L87 Difference]: Start difference. First operand 7164 states and 21733 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:31,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:22:31,213 INFO L93 Difference]: Finished difference Result 8182 states and 24723 transitions. [2021-06-12 22:22:31,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-12 22:22:31,213 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-12 22:22:31,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:22:31,223 INFO L225 Difference]: With dead ends: 8182 [2021-06-12 22:22:31,223 INFO L226 Difference]: Without dead ends: 8142 [2021-06-12 22:22:31,223 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 940 ImplicationChecksByTransitivity, 2176.7ms TimeCoverageRelationStatistics Valid=299, Invalid=3483, Unknown=0, NotChecked=0, Total=3782 [2021-06-12 22:22:31,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8142 states. [2021-06-12 22:22:31,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8142 to 7182. [2021-06-12 22:22:31,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7182 states, 7181 states have (on average 3.0327252471800583) internal successors, (21778), 7181 states have internal predecessors, (21778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:31,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7182 states to 7182 states and 21778 transitions. [2021-06-12 22:22:31,307 INFO L78 Accepts]: Start accepts. Automaton has 7182 states and 21778 transitions. Word has length 48 [2021-06-12 22:22:31,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:22:31,307 INFO L482 AbstractCegarLoop]: Abstraction has 7182 states and 21778 transitions. [2021-06-12 22:22:31,308 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:31,308 INFO L276 IsEmpty]: Start isEmpty. Operand 7182 states and 21778 transitions. [2021-06-12 22:22:31,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-12 22:22:31,314 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:22:31,315 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:22:31,515 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:22:31,515 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:22:31,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:22:31,515 INFO L82 PathProgramCache]: Analyzing trace with hash 71540424, now seen corresponding path program 10 times [2021-06-12 22:22:31,515 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:22:31,516 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503418009] [2021-06-12 22:22:31,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:22:31,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:22:31,953 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:22:31,953 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:22:31,953 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503418009] [2021-06-12 22:22:31,953 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503418009] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:22:31,953 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [909744045] [2021-06-12 22:22:31,953 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:22:31,987 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:22:31,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:22:31,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-12 22:22:31,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:22:32,117 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:22:32,117 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:22:32,129 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:22:32,130 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:22:32,130 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-12 22:22:32,284 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-12 22:22:32,285 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:22:32,296 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:22:32,296 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:22:32,296 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:32 [2021-06-12 22:22:32,702 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:22:32,702 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [909744045] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:22:32,702 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:22:32,702 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-12 22:22:32,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755123340] [2021-06-12 22:22:32,702 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-12 22:22:32,702 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:22:32,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-12 22:22:32,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1364, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 22:22:32,703 INFO L87 Difference]: Start difference. First operand 7182 states and 21778 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:34,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:22:34,544 INFO L93 Difference]: Finished difference Result 9375 states and 28170 transitions. [2021-06-12 22:22:34,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-12 22:22:34,545 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-12 22:22:34,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:22:34,556 INFO L225 Difference]: With dead ends: 9375 [2021-06-12 22:22:34,557 INFO L226 Difference]: Without dead ends: 9330 [2021-06-12 22:22:34,557 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 899 ImplicationChecksByTransitivity, 1887.4ms TimeCoverageRelationStatistics Valid=261, Invalid=3279, Unknown=0, NotChecked=0, Total=3540 [2021-06-12 22:22:34,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9330 states. [2021-06-12 22:22:34,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9330 to 7176. [2021-06-12 22:22:34,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7176 states, 7175 states have (on average 3.0326132404181183) internal successors, (21759), 7175 states have internal predecessors, (21759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:34,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7176 states to 7176 states and 21759 transitions. [2021-06-12 22:22:34,654 INFO L78 Accepts]: Start accepts. Automaton has 7176 states and 21759 transitions. Word has length 48 [2021-06-12 22:22:34,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:22:34,654 INFO L482 AbstractCegarLoop]: Abstraction has 7176 states and 21759 transitions. [2021-06-12 22:22:34,654 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:34,654 INFO L276 IsEmpty]: Start isEmpty. Operand 7176 states and 21759 transitions. [2021-06-12 22:22:34,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-12 22:22:34,661 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:22:34,661 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:22:34,861 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2021-06-12 22:22:34,861 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:22:34,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:22:34,862 INFO L82 PathProgramCache]: Analyzing trace with hash -875191376, now seen corresponding path program 11 times [2021-06-12 22:22:34,862 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:22:34,862 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023017680] [2021-06-12 22:22:34,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:22:34,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:22:35,295 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:22:35,295 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:22:35,295 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023017680] [2021-06-12 22:22:35,295 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1023017680] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:22:35,295 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [398453980] [2021-06-12 22:22:35,295 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:22:35,329 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 22:22:35,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:22:35,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-12 22:22:35,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:22:35,453 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:22:35,454 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:22:35,466 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:22:35,467 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:22:35,467 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-12 22:22:35,668 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:22:35,668 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:22:35,679 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:22:35,680 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:22:35,680 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-06-12 22:22:36,079 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:22:36,079 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [398453980] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:22:36,079 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:22:36,079 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-12 22:22:36,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910422304] [2021-06-12 22:22:36,080 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-12 22:22:36,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:22:36,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-12 22:22:36,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1364, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 22:22:36,080 INFO L87 Difference]: Start difference. First operand 7176 states and 21759 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:37,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:22:37,858 INFO L93 Difference]: Finished difference Result 9432 states and 28244 transitions. [2021-06-12 22:22:37,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-12 22:22:37,859 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-12 22:22:37,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:22:37,869 INFO L225 Difference]: With dead ends: 9432 [2021-06-12 22:22:37,870 INFO L226 Difference]: Without dead ends: 9373 [2021-06-12 22:22:37,870 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 866 ImplicationChecksByTransitivity, 1833.1ms TimeCoverageRelationStatistics Valid=255, Invalid=3167, Unknown=0, NotChecked=0, Total=3422 [2021-06-12 22:22:37,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9373 states. [2021-06-12 22:22:37,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9373 to 7182. [2021-06-12 22:22:37,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7182 states, 7181 states have (on average 3.0318897089541847) internal successors, (21772), 7181 states have internal predecessors, (21772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:37,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7182 states to 7182 states and 21772 transitions. [2021-06-12 22:22:37,967 INFO L78 Accepts]: Start accepts. Automaton has 7182 states and 21772 transitions. Word has length 48 [2021-06-12 22:22:37,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:22:37,967 INFO L482 AbstractCegarLoop]: Abstraction has 7182 states and 21772 transitions. [2021-06-12 22:22:37,967 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:37,967 INFO L276 IsEmpty]: Start isEmpty. Operand 7182 states and 21772 transitions. [2021-06-12 22:22:37,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-12 22:22:37,974 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:22:37,974 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:22:38,175 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2021-06-12 22:22:38,175 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:22:38,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:22:38,175 INFO L82 PathProgramCache]: Analyzing trace with hash -1029628894, now seen corresponding path program 12 times [2021-06-12 22:22:38,175 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:22:38,175 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81680771] [2021-06-12 22:22:38,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:22:38,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:22:38,594 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:22:38,594 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:22:38,594 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81680771] [2021-06-12 22:22:38,594 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81680771] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:22:38,594 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2083500971] [2021-06-12 22:22:38,595 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:22:38,631 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 22:22:38,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:22:38,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 44 conjunts are in the unsatisfiable core [2021-06-12 22:22:38,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:22:38,794 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:22:38,795 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:22:38,809 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:22:38,810 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:22:38,810 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-12 22:22:38,978 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:22:38,979 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:22:38,990 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:22:38,991 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:22:38,991 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-06-12 22:22:39,464 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:22:39,465 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2083500971] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:22:39,465 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:22:39,465 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22] total 40 [2021-06-12 22:22:39,465 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312807874] [2021-06-12 22:22:39,465 INFO L462 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-06-12 22:22:39,465 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:22:39,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-06-12 22:22:39,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=1509, Unknown=0, NotChecked=0, Total=1640 [2021-06-12 22:22:39,466 INFO L87 Difference]: Start difference. First operand 7182 states and 21772 transitions. Second operand has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:41,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:22:41,609 INFO L93 Difference]: Finished difference Result 9391 states and 28168 transitions. [2021-06-12 22:22:41,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-12 22:22:41,609 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-12 22:22:41,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:22:41,621 INFO L225 Difference]: With dead ends: 9391 [2021-06-12 22:22:41,621 INFO L226 Difference]: Without dead ends: 9235 [2021-06-12 22:22:41,621 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 995 ImplicationChecksByTransitivity, 1936.8ms TimeCoverageRelationStatistics Valid=283, Invalid=3499, Unknown=0, NotChecked=0, Total=3782 [2021-06-12 22:22:41,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9235 states. [2021-06-12 22:22:41,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9235 to 7116. [2021-06-12 22:22:41,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7116 states, 7115 states have (on average 3.036261419536191) internal successors, (21603), 7115 states have internal predecessors, (21603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:41,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7116 states to 7116 states and 21603 transitions. [2021-06-12 22:22:41,745 INFO L78 Accepts]: Start accepts. Automaton has 7116 states and 21603 transitions. Word has length 48 [2021-06-12 22:22:41,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:22:41,745 INFO L482 AbstractCegarLoop]: Abstraction has 7116 states and 21603 transitions. [2021-06-12 22:22:41,745 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:41,745 INFO L276 IsEmpty]: Start isEmpty. Operand 7116 states and 21603 transitions. [2021-06-12 22:22:41,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-12 22:22:41,752 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:22:41,752 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:22:41,952 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:22:41,952 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:22:41,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:22:41,953 INFO L82 PathProgramCache]: Analyzing trace with hash 1741951032, now seen corresponding path program 13 times [2021-06-12 22:22:41,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:22:41,953 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394097021] [2021-06-12 22:22:41,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:22:41,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:22:42,367 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:22:42,367 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:22:42,368 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394097021] [2021-06-12 22:22:42,368 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394097021] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:22:42,368 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [112936694] [2021-06-12 22:22:42,368 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:22:42,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:22:42,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-12 22:22:42,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:22:42,526 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:22:42,527 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:22:42,540 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:22:42,540 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:22:42,540 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-12 22:22:42,695 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-12 22:22:42,696 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:22:42,707 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:22:42,707 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:22:42,707 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:32 [2021-06-12 22:22:43,134 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:22:43,134 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [112936694] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:22:43,134 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:22:43,134 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-12 22:22:43,134 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438539185] [2021-06-12 22:22:43,134 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-12 22:22:43,134 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:22:43,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-12 22:22:43,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1366, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 22:22:43,135 INFO L87 Difference]: Start difference. First operand 7116 states and 21603 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:45,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:22:45,123 INFO L93 Difference]: Finished difference Result 8124 states and 24570 transitions. [2021-06-12 22:22:45,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-12 22:22:45,123 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-12 22:22:45,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:22:45,133 INFO L225 Difference]: With dead ends: 8124 [2021-06-12 22:22:45,133 INFO L226 Difference]: Without dead ends: 8084 [2021-06-12 22:22:45,133 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 884 ImplicationChecksByTransitivity, 2134.0ms TimeCoverageRelationStatistics Valid=311, Invalid=3349, Unknown=0, NotChecked=0, Total=3660 [2021-06-12 22:22:45,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8084 states. [2021-06-12 22:22:45,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8084 to 7124. [2021-06-12 22:22:45,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7124 states, 7123 states have (on average 3.0355187421030463) internal successors, (21622), 7123 states have internal predecessors, (21622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:45,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7124 states to 7124 states and 21622 transitions. [2021-06-12 22:22:45,217 INFO L78 Accepts]: Start accepts. Automaton has 7124 states and 21622 transitions. Word has length 48 [2021-06-12 22:22:45,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:22:45,217 INFO L482 AbstractCegarLoop]: Abstraction has 7124 states and 21622 transitions. [2021-06-12 22:22:45,217 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:45,217 INFO L276 IsEmpty]: Start isEmpty. Operand 7124 states and 21622 transitions. [2021-06-12 22:22:45,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-12 22:22:45,224 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:22:45,224 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:22:45,424 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-06-12 22:22:45,424 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:22:45,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:22:45,425 INFO L82 PathProgramCache]: Analyzing trace with hash 865768568, now seen corresponding path program 14 times [2021-06-12 22:22:45,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:22:45,425 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782550127] [2021-06-12 22:22:45,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:22:45,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:22:45,839 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:22:45,839 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:22:45,839 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782550127] [2021-06-12 22:22:45,839 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782550127] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:22:45,839 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1874069701] [2021-06-12 22:22:45,840 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:22:45,916 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:22:45,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:22:45,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-12 22:22:45,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:22:46,043 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:22:46,044 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:22:46,056 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:22:46,056 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:22:46,057 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-12 22:22:46,211 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:22:46,212 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:22:46,223 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:22:46,224 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:22:46,224 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-06-12 22:22:46,638 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:22:46,639 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1874069701] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:22:46,639 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:22:46,639 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-12 22:22:46,639 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269910510] [2021-06-12 22:22:46,639 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-12 22:22:46,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:22:46,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-12 22:22:46,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1366, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 22:22:46,639 INFO L87 Difference]: Start difference. First operand 7124 states and 21622 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:48,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:22:48,625 INFO L93 Difference]: Finished difference Result 8090 states and 24501 transitions. [2021-06-12 22:22:48,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-12 22:22:48,626 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-12 22:22:48,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:22:48,636 INFO L225 Difference]: With dead ends: 8090 [2021-06-12 22:22:48,636 INFO L226 Difference]: Without dead ends: 8051 [2021-06-12 22:22:48,636 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 865 ImplicationChecksByTransitivity, 2001.3ms TimeCoverageRelationStatistics Valid=286, Invalid=3254, Unknown=0, NotChecked=0, Total=3540 [2021-06-12 22:22:48,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8051 states. [2021-06-12 22:22:48,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8051 to 7120. [2021-06-12 22:22:48,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7120 states, 7119 states have (on average 3.0361005759235846) internal successors, (21614), 7119 states have internal predecessors, (21614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:48,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7120 states to 7120 states and 21614 transitions. [2021-06-12 22:22:48,722 INFO L78 Accepts]: Start accepts. Automaton has 7120 states and 21614 transitions. Word has length 48 [2021-06-12 22:22:48,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:22:48,722 INFO L482 AbstractCegarLoop]: Abstraction has 7120 states and 21614 transitions. [2021-06-12 22:22:48,722 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:48,723 INFO L276 IsEmpty]: Start isEmpty. Operand 7120 states and 21614 transitions. [2021-06-12 22:22:48,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-12 22:22:48,730 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:22:48,730 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:22:48,930 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-06-12 22:22:48,930 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:22:48,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:22:48,931 INFO L82 PathProgramCache]: Analyzing trace with hash 2109815928, now seen corresponding path program 15 times [2021-06-12 22:22:48,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:22:48,931 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149589050] [2021-06-12 22:22:48,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:22:48,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:22:49,341 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:22:49,341 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:22:49,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149589050] [2021-06-12 22:22:49,341 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1149589050] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:22:49,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [477276999] [2021-06-12 22:22:49,341 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:22:49,374 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 22:22:49,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:22:49,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-12 22:22:49,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:22:49,500 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:22:49,500 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:22:49,513 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:22:49,513 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:22:49,513 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-12 22:22:49,669 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:22:49,670 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:22:49,681 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:22:49,682 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:22:49,682 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-06-12 22:22:50,140 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:22:50,140 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [477276999] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:22:50,140 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:22:50,140 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-12 22:22:50,141 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119740984] [2021-06-12 22:22:50,141 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-12 22:22:50,141 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:22:50,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-12 22:22:50,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1366, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 22:22:50,141 INFO L87 Difference]: Start difference. First operand 7120 states and 21614 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:52,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:22:52,368 INFO L93 Difference]: Finished difference Result 8130 states and 24582 transitions. [2021-06-12 22:22:52,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-12 22:22:52,369 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-12 22:22:52,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:22:52,379 INFO L225 Difference]: With dead ends: 8130 [2021-06-12 22:22:52,379 INFO L226 Difference]: Without dead ends: 8090 [2021-06-12 22:22:52,379 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 884 ImplicationChecksByTransitivity, 2187.2ms TimeCoverageRelationStatistics Valid=311, Invalid=3349, Unknown=0, NotChecked=0, Total=3660 [2021-06-12 22:22:52,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8090 states. [2021-06-12 22:22:52,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8090 to 7126. [2021-06-12 22:22:52,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7126 states, 7125 states have (on average 3.0353684210526315) internal successors, (21627), 7125 states have internal predecessors, (21627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:52,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7126 states to 7126 states and 21627 transitions. [2021-06-12 22:22:52,490 INFO L78 Accepts]: Start accepts. Automaton has 7126 states and 21627 transitions. Word has length 48 [2021-06-12 22:22:52,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:22:52,490 INFO L482 AbstractCegarLoop]: Abstraction has 7126 states and 21627 transitions. [2021-06-12 22:22:52,490 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:52,490 INFO L276 IsEmpty]: Start isEmpty. Operand 7126 states and 21627 transitions. [2021-06-12 22:22:52,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-12 22:22:52,498 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:22:52,498 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:22:52,699 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable104 [2021-06-12 22:22:52,699 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:22:52,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:22:52,700 INFO L82 PathProgramCache]: Analyzing trace with hash -421481438, now seen corresponding path program 16 times [2021-06-12 22:22:52,700 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:22:52,700 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627480206] [2021-06-12 22:22:52,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:22:52,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:22:53,220 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:22:53,220 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:22:53,220 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627480206] [2021-06-12 22:22:53,220 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [627480206] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:22:53,220 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [388522976] [2021-06-12 22:22:53,220 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:22:53,252 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:22:53,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:22:53,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-12 22:22:53,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:22:53,379 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:22:53,380 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:22:53,392 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:22:53,392 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:22:53,392 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-12 22:22:53,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-12 22:22:53,546 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:22:53,557 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:22:53,557 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:22:53,558 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:32 [2021-06-12 22:22:53,968 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:22:53,969 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [388522976] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:22:53,969 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:22:53,969 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-12 22:22:53,969 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809199015] [2021-06-12 22:22:53,969 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-12 22:22:53,969 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:22:53,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-12 22:22:53,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1366, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 22:22:53,970 INFO L87 Difference]: Start difference. First operand 7126 states and 21627 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:55,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:22:55,749 INFO L93 Difference]: Finished difference Result 8100 states and 24522 transitions. [2021-06-12 22:22:55,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-12 22:22:55,750 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-12 22:22:55,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:22:55,759 INFO L225 Difference]: With dead ends: 8100 [2021-06-12 22:22:55,759 INFO L226 Difference]: Without dead ends: 8055 [2021-06-12 22:22:55,760 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 865 ImplicationChecksByTransitivity, 2063.2ms TimeCoverageRelationStatistics Valid=286, Invalid=3254, Unknown=0, NotChecked=0, Total=3540 [2021-06-12 22:22:55,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8055 states. [2021-06-12 22:22:55,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8055 to 7120. [2021-06-12 22:22:55,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7120 states, 7119 states have (on average 3.035819637589549) internal successors, (21612), 7119 states have internal predecessors, (21612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:55,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7120 states to 7120 states and 21612 transitions. [2021-06-12 22:22:55,861 INFO L78 Accepts]: Start accepts. Automaton has 7120 states and 21612 transitions. Word has length 48 [2021-06-12 22:22:55,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:22:55,861 INFO L482 AbstractCegarLoop]: Abstraction has 7120 states and 21612 transitions. [2021-06-12 22:22:55,861 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:55,861 INFO L276 IsEmpty]: Start isEmpty. Operand 7120 states and 21612 transitions. [2021-06-12 22:22:55,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-12 22:22:55,868 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:22:55,868 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:22:56,068 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:22:56,069 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:22:56,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:22:56,069 INFO L82 PathProgramCache]: Analyzing trace with hash -361185096, now seen corresponding path program 17 times [2021-06-12 22:22:56,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:22:56,069 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120698626] [2021-06-12 22:22:56,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:22:56,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:22:56,463 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:22:56,464 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:22:56,464 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120698626] [2021-06-12 22:22:56,464 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2120698626] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:22:56,464 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1698270030] [2021-06-12 22:22:56,464 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:22:56,497 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 22:22:56,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:22:56,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-12 22:22:56,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:22:56,621 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:22:56,622 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:22:56,634 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:22:56,635 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:22:56,635 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-12 22:22:56,789 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:22:56,790 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:22:56,801 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:22:56,802 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:22:56,802 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-06-12 22:22:57,241 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:22:57,241 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1698270030] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:22:57,241 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:22:57,241 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-12 22:22:57,241 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183912664] [2021-06-12 22:22:57,241 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-12 22:22:57,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:22:57,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-12 22:22:57,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1364, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 22:22:57,242 INFO L87 Difference]: Start difference. First operand 7120 states and 21612 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:58,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:22:58,861 INFO L93 Difference]: Finished difference Result 9313 states and 28006 transitions. [2021-06-12 22:22:58,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-12 22:22:58,861 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-12 22:22:58,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:22:58,873 INFO L225 Difference]: With dead ends: 9313 [2021-06-12 22:22:58,873 INFO L226 Difference]: Without dead ends: 9278 [2021-06-12 22:22:58,873 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 862 ImplicationChecksByTransitivity, 1818.9ms TimeCoverageRelationStatistics Valid=257, Invalid=3165, Unknown=0, NotChecked=0, Total=3422 [2021-06-12 22:22:58,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9278 states. [2021-06-12 22:22:58,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9278 to 7124. [2021-06-12 22:22:58,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7124 states, 7123 states have (on average 3.035237961533062) internal successors, (21620), 7123 states have internal predecessors, (21620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:58,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7124 states to 7124 states and 21620 transitions. [2021-06-12 22:22:58,972 INFO L78 Accepts]: Start accepts. Automaton has 7124 states and 21620 transitions. Word has length 48 [2021-06-12 22:22:58,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:22:58,972 INFO L482 AbstractCegarLoop]: Abstraction has 7124 states and 21620 transitions. [2021-06-12 22:22:58,972 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:58,972 INFO L276 IsEmpty]: Start isEmpty. Operand 7124 states and 21620 transitions. [2021-06-12 22:22:58,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-12 22:22:58,979 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:22:58,979 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:22:59,179 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2021-06-12 22:22:59,180 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:22:59,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:22:59,180 INFO L82 PathProgramCache]: Analyzing trace with hash -968622856, now seen corresponding path program 18 times [2021-06-12 22:22:59,180 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:22:59,180 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335598293] [2021-06-12 22:22:59,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:22:59,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:22:59,629 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:22:59,629 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:22:59,629 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335598293] [2021-06-12 22:22:59,629 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [335598293] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:22:59,629 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2057459684] [2021-06-12 22:22:59,629 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:22:59,663 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 22:22:59,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:22:59,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 44 conjunts are in the unsatisfiable core [2021-06-12 22:22:59,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:22:59,788 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:22:59,789 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:22:59,801 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:22:59,802 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:22:59,802 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-12 22:23:00,033 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:23:00,034 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:23:00,045 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:23:00,045 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:23:00,045 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-06-12 22:23:00,458 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:23:00,459 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2057459684] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:23:00,459 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:23:00,459 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22] total 40 [2021-06-12 22:23:00,459 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771226747] [2021-06-12 22:23:00,459 INFO L462 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-06-12 22:23:00,459 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:23:00,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-06-12 22:23:00,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=1512, Unknown=0, NotChecked=0, Total=1640 [2021-06-12 22:23:00,460 INFO L87 Difference]: Start difference. First operand 7124 states and 21620 transitions. Second operand has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:23:02,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:23:02,155 INFO L93 Difference]: Finished difference Result 9317 states and 28012 transitions. [2021-06-12 22:23:02,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-12 22:23:02,155 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-12 22:23:02,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:23:02,165 INFO L225 Difference]: With dead ends: 9317 [2021-06-12 22:23:02,166 INFO L226 Difference]: Without dead ends: 9272 [2021-06-12 22:23:02,166 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 967 ImplicationChecksByTransitivity, 1931.0ms TimeCoverageRelationStatistics Valid=273, Invalid=3387, Unknown=0, NotChecked=0, Total=3660 [2021-06-12 22:23:02,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9272 states. [2021-06-12 22:23:02,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9272 to 7118. [2021-06-12 22:23:02,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7118 states, 7117 states have (on average 3.0359702121680483) internal successors, (21607), 7117 states have internal predecessors, (21607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:23:02,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7118 states to 7118 states and 21607 transitions. [2021-06-12 22:23:02,262 INFO L78 Accepts]: Start accepts. Automaton has 7118 states and 21607 transitions. Word has length 48 [2021-06-12 22:23:02,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:23:02,262 INFO L482 AbstractCegarLoop]: Abstraction has 7118 states and 21607 transitions. [2021-06-12 22:23:02,262 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:23:02,262 INFO L276 IsEmpty]: Start isEmpty. Operand 7118 states and 21607 transitions. [2021-06-12 22:23:02,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-12 22:23:02,269 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:23:02,269 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:23:02,469 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2021-06-12 22:23:02,470 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:23:02,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:23:02,470 INFO L82 PathProgramCache]: Analyzing trace with hash -431460084, now seen corresponding path program 19 times [2021-06-12 22:23:02,470 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:23:02,470 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263596004] [2021-06-12 22:23:02,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:23:02,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:23:02,888 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:23:02,888 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:23:02,888 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263596004] [2021-06-12 22:23:02,889 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [263596004] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:23:02,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1840976012] [2021-06-12 22:23:02,889 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:23:02,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:23:02,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-12 22:23:02,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:23:03,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:23:03,048 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:23:03,060 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:23:03,061 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:23:03,061 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-12 22:23:03,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-12 22:23:03,217 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:23:03,228 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:23:03,229 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:23:03,229 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:32 [2021-06-12 22:23:03,647 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:23:03,647 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1840976012] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:23:03,647 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:23:03,647 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-12 22:23:03,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558666374] [2021-06-12 22:23:03,647 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-12 22:23:03,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:23:03,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-12 22:23:03,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1366, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 22:23:03,648 INFO L87 Difference]: Start difference. First operand 7118 states and 21607 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:23:05,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:23:05,645 INFO L93 Difference]: Finished difference Result 8135 states and 24594 transitions. [2021-06-12 22:23:05,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-12 22:23:05,645 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-12 22:23:05,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:23:05,655 INFO L225 Difference]: With dead ends: 8135 [2021-06-12 22:23:05,655 INFO L226 Difference]: Without dead ends: 8082 [2021-06-12 22:23:05,655 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 938 ImplicationChecksByTransitivity, 2059.0ms TimeCoverageRelationStatistics Valid=305, Invalid=3477, Unknown=0, NotChecked=0, Total=3782 [2021-06-12 22:23:05,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8082 states. [2021-06-12 22:23:05,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8082 to 7126. [2021-06-12 22:23:05,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7126 states, 7125 states have (on average 3.0345263157894737) internal successors, (21621), 7125 states have internal predecessors, (21621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:23:05,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7126 states to 7126 states and 21621 transitions. [2021-06-12 22:23:05,739 INFO L78 Accepts]: Start accepts. Automaton has 7126 states and 21621 transitions. Word has length 48 [2021-06-12 22:23:05,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:23:05,739 INFO L482 AbstractCegarLoop]: Abstraction has 7126 states and 21621 transitions. [2021-06-12 22:23:05,739 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:23:05,739 INFO L276 IsEmpty]: Start isEmpty. Operand 7126 states and 21621 transitions. [2021-06-12 22:23:05,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-12 22:23:05,746 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:23:05,746 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:23:05,946 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:23:05,946 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:23:05,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:23:05,946 INFO L82 PathProgramCache]: Analyzing trace with hash -1307642548, now seen corresponding path program 20 times [2021-06-12 22:23:05,947 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:23:05,947 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570020917] [2021-06-12 22:23:05,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:23:05,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:23:06,349 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:23:06,350 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:23:06,350 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570020917] [2021-06-12 22:23:06,350 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [570020917] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:23:06,350 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1768759108] [2021-06-12 22:23:06,350 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:23:06,382 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:23:06,382 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:23:06,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-12 22:23:06,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:23:06,509 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:23:06,510 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:23:06,522 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:23:06,522 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:23:06,523 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-12 22:23:06,678 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:23:06,679 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:23:06,690 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:23:06,690 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:23:06,690 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-06-12 22:23:07,138 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:23:07,138 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1768759108] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:23:07,138 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:23:07,138 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-12 22:23:07,138 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550931199] [2021-06-12 22:23:07,139 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-12 22:23:07,139 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:23:07,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-12 22:23:07,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1364, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 22:23:07,139 INFO L87 Difference]: Start difference. First operand 7126 states and 21621 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:23:08,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:23:08,705 INFO L93 Difference]: Finished difference Result 9315 states and 28005 transitions. [2021-06-12 22:23:08,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-12 22:23:08,705 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-12 22:23:08,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:23:08,717 INFO L225 Difference]: With dead ends: 9315 [2021-06-12 22:23:08,717 INFO L226 Difference]: Without dead ends: 9272 [2021-06-12 22:23:08,717 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 900 ImplicationChecksByTransitivity, 1833.1ms TimeCoverageRelationStatistics Valid=263, Invalid=3277, Unknown=0, NotChecked=0, Total=3540 [2021-06-12 22:23:08,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9272 states. [2021-06-12 22:23:08,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9272 to 7118. [2021-06-12 22:23:08,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7118 states, 7117 states have (on average 3.0358297035267667) internal successors, (21606), 7117 states have internal predecessors, (21606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:23:08,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7118 states to 7118 states and 21606 transitions. [2021-06-12 22:23:08,815 INFO L78 Accepts]: Start accepts. Automaton has 7118 states and 21606 transitions. Word has length 48 [2021-06-12 22:23:08,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:23:08,815 INFO L482 AbstractCegarLoop]: Abstraction has 7118 states and 21606 transitions. [2021-06-12 22:23:08,815 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:23:08,815 INFO L276 IsEmpty]: Start isEmpty. Operand 7118 states and 21606 transitions. [2021-06-12 22:23:08,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-12 22:23:08,822 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:23:08,822 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:23:09,022 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:23:09,025 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:23:09,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:23:09,025 INFO L82 PathProgramCache]: Analyzing trace with hash 1707410812, now seen corresponding path program 21 times [2021-06-12 22:23:09,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:23:09,025 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745122811] [2021-06-12 22:23:09,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:23:09,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:23:09,471 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:23:09,471 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:23:09,471 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745122811] [2021-06-12 22:23:09,471 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745122811] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:23:09,471 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1713005022] [2021-06-12 22:23:09,471 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:23:09,505 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 22:23:09,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:23:09,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-12 22:23:09,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:23:09,629 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:23:09,630 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:23:09,642 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:23:09,643 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:23:09,643 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-12 22:23:09,798 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:23:09,798 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:23:09,809 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:23:09,810 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:23:09,810 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-06-12 22:23:10,221 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:23:10,222 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1713005022] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:23:10,222 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:23:10,222 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-12 22:23:10,222 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224176958] [2021-06-12 22:23:10,222 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-12 22:23:10,222 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:23:10,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-12 22:23:10,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1366, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 22:23:10,222 INFO L87 Difference]: Start difference. First operand 7118 states and 21606 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:23:12,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:23:12,220 INFO L93 Difference]: Finished difference Result 8143 states and 24611 transitions. [2021-06-12 22:23:12,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-12 22:23:12,220 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-12 22:23:12,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:23:12,230 INFO L225 Difference]: With dead ends: 8143 [2021-06-12 22:23:12,230 INFO L226 Difference]: Without dead ends: 8090 [2021-06-12 22:23:12,230 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 938 ImplicationChecksByTransitivity, 2150.0ms TimeCoverageRelationStatistics Valid=305, Invalid=3477, Unknown=0, NotChecked=0, Total=3782 [2021-06-12 22:23:12,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8090 states. [2021-06-12 22:23:12,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8090 to 7130. [2021-06-12 22:23:12,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7130 states, 7129 states have (on average 3.0343666713424042) internal successors, (21632), 7129 states have internal predecessors, (21632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:23:12,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7130 states to 7130 states and 21632 transitions. [2021-06-12 22:23:12,318 INFO L78 Accepts]: Start accepts. Automaton has 7130 states and 21632 transitions. Word has length 48 [2021-06-12 22:23:12,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:23:12,318 INFO L482 AbstractCegarLoop]: Abstraction has 7130 states and 21632 transitions. [2021-06-12 22:23:12,318 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:23:12,318 INFO L276 IsEmpty]: Start isEmpty. Operand 7130 states and 21632 transitions. [2021-06-12 22:23:12,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-12 22:23:12,325 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:23:12,325 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:23:12,526 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,108 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:23:12,526 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:23:12,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:23:12,526 INFO L82 PathProgramCache]: Analyzing trace with hash -823886554, now seen corresponding path program 22 times [2021-06-12 22:23:12,526 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:23:12,526 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521463711] [2021-06-12 22:23:12,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:23:12,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:23:12,974 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:23:12,974 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:23:12,974 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521463711] [2021-06-12 22:23:12,974 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521463711] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:23:12,974 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1774741947] [2021-06-12 22:23:12,974 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:23:13,006 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:23:13,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:23:13,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-12 22:23:13,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:23:13,131 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:23:13,132 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:23:13,144 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:23:13,145 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:23:13,145 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-12 22:23:13,300 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-12 22:23:13,300 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:23:13,312 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:23:13,313 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:23:13,313 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:32 [2021-06-12 22:23:13,717 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:23:13,717 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1774741947] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:23:13,717 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:23:13,717 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-12 22:23:13,717 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726709023] [2021-06-12 22:23:13,717 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-12 22:23:13,717 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:23:13,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-12 22:23:13,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1364, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 22:23:13,718 INFO L87 Difference]: Start difference. First operand 7130 states and 21632 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:23:15,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:23:15,219 INFO L93 Difference]: Finished difference Result 9323 states and 28024 transitions. [2021-06-12 22:23:15,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-12 22:23:15,219 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-12 22:23:15,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:23:15,230 INFO L225 Difference]: With dead ends: 9323 [2021-06-12 22:23:15,230 INFO L226 Difference]: Without dead ends: 9270 [2021-06-12 22:23:15,231 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 900 ImplicationChecksByTransitivity, 1837.5ms TimeCoverageRelationStatistics Valid=263, Invalid=3277, Unknown=0, NotChecked=0, Total=3540 [2021-06-12 22:23:15,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9270 states. [2021-06-12 22:23:15,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9270 to 7116. [2021-06-12 22:23:15,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7116 states, 7115 states have (on average 3.0359803232607168) internal successors, (21601), 7115 states have internal predecessors, (21601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:23:15,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7116 states to 7116 states and 21601 transitions. [2021-06-12 22:23:15,326 INFO L78 Accepts]: Start accepts. Automaton has 7116 states and 21601 transitions. Word has length 48 [2021-06-12 22:23:15,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:23:15,326 INFO L482 AbstractCegarLoop]: Abstraction has 7116 states and 21601 transitions. [2021-06-12 22:23:15,327 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:23:15,327 INFO L276 IsEmpty]: Start isEmpty. Operand 7116 states and 21601 transitions. [2021-06-12 22:23:15,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-12 22:23:15,333 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:23:15,334 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:23:15,534 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:23:15,534 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:23:15,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:23:15,534 INFO L82 PathProgramCache]: Analyzing trace with hash -1369584806, now seen corresponding path program 23 times [2021-06-12 22:23:15,534 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:23:15,534 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598836795] [2021-06-12 22:23:15,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:23:15,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:23:15,938 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:23:15,938 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:23:15,938 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598836795] [2021-06-12 22:23:15,938 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598836795] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:23:15,939 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [756163202] [2021-06-12 22:23:15,939 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:23:15,972 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 22:23:15,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:23:15,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-12 22:23:15,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:23:16,098 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:23:16,099 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:23:16,113 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:23:16,114 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:23:16,114 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-12 22:23:16,269 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:23:16,270 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:23:16,281 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:23:16,281 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:23:16,281 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-06-12 22:23:16,729 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:23:16,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [756163202] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:23:16,730 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:23:16,730 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-12 22:23:16,730 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220134057] [2021-06-12 22:23:16,730 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-12 22:23:16,730 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:23:16,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-12 22:23:16,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1366, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 22:23:16,730 INFO L87 Difference]: Start difference. First operand 7116 states and 21601 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:23:18,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:23:18,806 INFO L93 Difference]: Finished difference Result 8116 states and 24546 transitions. [2021-06-12 22:23:18,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-12 22:23:18,806 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-12 22:23:18,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:23:18,816 INFO L225 Difference]: With dead ends: 8116 [2021-06-12 22:23:18,816 INFO L226 Difference]: Without dead ends: 8076 [2021-06-12 22:23:18,817 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 938 ImplicationChecksByTransitivity, 2036.8ms TimeCoverageRelationStatistics Valid=305, Invalid=3477, Unknown=0, NotChecked=0, Total=3782 [2021-06-12 22:23:18,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8076 states. [2021-06-12 22:23:18,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8076 to 7120. [2021-06-12 22:23:18,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7120 states, 7119 states have (on average 3.035257760921478) internal successors, (21608), 7119 states have internal predecessors, (21608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:23:18,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7120 states to 7120 states and 21608 transitions. [2021-06-12 22:23:18,913 INFO L78 Accepts]: Start accepts. Automaton has 7120 states and 21608 transitions. Word has length 48 [2021-06-12 22:23:18,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:23:18,913 INFO L482 AbstractCegarLoop]: Abstraction has 7120 states and 21608 transitions. [2021-06-12 22:23:18,914 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:23:18,914 INFO L276 IsEmpty]: Start isEmpty. Operand 7120 states and 21608 transitions. [2021-06-12 22:23:18,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-12 22:23:18,921 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:23:18,921 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:23:19,123 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2021-06-12 22:23:19,123 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:23:19,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:23:19,124 INFO L82 PathProgramCache]: Analyzing trace with hash 2049200026, now seen corresponding path program 24 times [2021-06-12 22:23:19,124 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:23:19,124 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888546250] [2021-06-12 22:23:19,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:23:19,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:23:19,559 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:23:19,560 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:23:19,560 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888546250] [2021-06-12 22:23:19,560 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [888546250] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:23:19,560 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [202154258] [2021-06-12 22:23:19,560 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:23:19,593 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 22:23:19,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:23:19,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 44 conjunts are in the unsatisfiable core [2021-06-12 22:23:19,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:23:19,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:23:19,720 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:23:19,732 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:23:19,733 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:23:19,733 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-12 22:23:19,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:23:19,964 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:23:19,975 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:23:19,976 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:23:19,976 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-06-12 22:23:20,392 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:23:20,393 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [202154258] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:23:20,393 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:23:20,393 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22] total 40 [2021-06-12 22:23:20,393 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716319789] [2021-06-12 22:23:20,393 INFO L462 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-06-12 22:23:20,393 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:23:20,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-06-12 22:23:20,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=1512, Unknown=0, NotChecked=0, Total=1640 [2021-06-12 22:23:20,394 INFO L87 Difference]: Start difference. First operand 7120 states and 21608 transitions. Second operand has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:23:22,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:23:22,143 INFO L93 Difference]: Finished difference Result 9309 states and 27992 transitions. [2021-06-12 22:23:22,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-12 22:23:22,143 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-12 22:23:22,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:23:22,155 INFO L225 Difference]: With dead ends: 9309 [2021-06-12 22:23:22,155 INFO L226 Difference]: Without dead ends: 9262 [2021-06-12 22:23:22,155 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1007 ImplicationChecksByTransitivity, 1924.8ms TimeCoverageRelationStatistics Valid=279, Invalid=3503, Unknown=0, NotChecked=0, Total=3782 [2021-06-12 22:23:22,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9262 states. [2021-06-12 22:23:22,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9262 to 7108. [2021-06-12 22:23:22,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7108 states, 7107 states have (on average 3.0372871816518927) internal successors, (21586), 7107 states have internal predecessors, (21586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:23:22,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7108 states to 7108 states and 21586 transitions. [2021-06-12 22:23:22,250 INFO L78 Accepts]: Start accepts. Automaton has 7108 states and 21586 transitions. Word has length 48 [2021-06-12 22:23:22,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:23:22,250 INFO L482 AbstractCegarLoop]: Abstraction has 7108 states and 21586 transitions. [2021-06-12 22:23:22,251 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:23:22,251 INFO L276 IsEmpty]: Start isEmpty. Operand 7108 states and 21586 transitions. [2021-06-12 22:23:22,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-12 22:23:22,258 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:23:22,258 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:23:22,458 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2021-06-12 22:23:22,458 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:23:22,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:23:22,459 INFO L82 PathProgramCache]: Analyzing trace with hash -376258376, now seen corresponding path program 25 times [2021-06-12 22:23:22,459 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:23:22,459 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223236270] [2021-06-12 22:23:22,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:23:22,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:23:22,886 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:23:22,886 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:23:22,886 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223236270] [2021-06-12 22:23:22,886 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1223236270] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:23:22,886 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2041458245] [2021-06-12 22:23:22,886 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:23:22,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:23:22,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-12 22:23:22,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:23:23,060 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:23:23,061 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:23:23,073 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:23:23,074 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:23:23,074 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-12 22:23:23,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-12 22:23:23,230 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:23:23,241 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:23:23,242 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:23:23,242 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:32 [2021-06-12 22:23:23,653 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:23:23,654 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2041458245] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:23:23,654 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:23:23,654 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-12 22:23:23,654 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969650362] [2021-06-12 22:23:23,654 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-12 22:23:23,654 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:23:23,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-12 22:23:23,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1366, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 22:23:23,654 INFO L87 Difference]: Start difference. First operand 7108 states and 21586 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:23:25,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:23:25,660 INFO L93 Difference]: Finished difference Result 8114 states and 24544 transitions. [2021-06-12 22:23:25,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-12 22:23:25,661 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-12 22:23:25,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:23:25,671 INFO L225 Difference]: With dead ends: 8114 [2021-06-12 22:23:25,671 INFO L226 Difference]: Without dead ends: 8074 [2021-06-12 22:23:25,671 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 938 ImplicationChecksByTransitivity, 2125.3ms TimeCoverageRelationStatistics Valid=305, Invalid=3477, Unknown=0, NotChecked=0, Total=3782 [2021-06-12 22:23:25,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8074 states. [2021-06-12 22:23:25,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8074 to 7114. [2021-06-12 22:23:25,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7114 states, 7113 states have (on average 3.0365527906649796) internal successors, (21599), 7113 states have internal predecessors, (21599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:23:25,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7114 states to 7114 states and 21599 transitions. [2021-06-12 22:23:25,754 INFO L78 Accepts]: Start accepts. Automaton has 7114 states and 21599 transitions. Word has length 48 [2021-06-12 22:23:25,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:23:25,754 INFO L482 AbstractCegarLoop]: Abstraction has 7114 states and 21599 transitions. [2021-06-12 22:23:25,754 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:23:25,754 INFO L276 IsEmpty]: Start isEmpty. Operand 7114 states and 21599 transitions. [2021-06-12 22:23:25,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-12 22:23:25,761 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:23:25,761 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:23:25,962 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2021-06-12 22:23:25,962 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:23:25,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:23:25,962 INFO L82 PathProgramCache]: Analyzing trace with hash 1387411554, now seen corresponding path program 26 times [2021-06-12 22:23:25,962 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:23:25,962 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611510241] [2021-06-12 22:23:25,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:23:25,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:23:26,363 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:23:26,363 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:23:26,363 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611510241] [2021-06-12 22:23:26,363 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611510241] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:23:26,363 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1190936478] [2021-06-12 22:23:26,363 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:23:26,396 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:23:26,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:23:26,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-12 22:23:26,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:23:26,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:23:26,523 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:23:26,535 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:23:26,535 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:23:26,536 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-12 22:23:26,732 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-12 22:23:26,733 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:23:26,746 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:23:26,747 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:23:26,747 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:32 [2021-06-12 22:23:27,150 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:23:27,150 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1190936478] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:23:27,150 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:23:27,150 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-12 22:23:27,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2147386410] [2021-06-12 22:23:27,151 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-12 22:23:27,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:23:27,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-12 22:23:27,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1364, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 22:23:27,151 INFO L87 Difference]: Start difference. First operand 7114 states and 21599 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:23:28,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:23:28,763 INFO L93 Difference]: Finished difference Result 9307 states and 27991 transitions. [2021-06-12 22:23:28,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-12 22:23:28,763 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-12 22:23:28,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:23:28,775 INFO L225 Difference]: With dead ends: 9307 [2021-06-12 22:23:28,775 INFO L226 Difference]: Without dead ends: 9219 [2021-06-12 22:23:28,775 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 900 ImplicationChecksByTransitivity, 1802.8ms TimeCoverageRelationStatistics Valid=263, Invalid=3277, Unknown=0, NotChecked=0, Total=3540 [2021-06-12 22:23:28,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9219 states. [2021-06-12 22:23:28,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9219 to 7065. [2021-06-12 22:23:28,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7065 states, 7064 states have (on average 3.042893544733862) internal successors, (21495), 7064 states have internal predecessors, (21495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:23:28,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7065 states to 7065 states and 21495 transitions. [2021-06-12 22:23:28,874 INFO L78 Accepts]: Start accepts. Automaton has 7065 states and 21495 transitions. Word has length 48 [2021-06-12 22:23:28,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:23:28,874 INFO L482 AbstractCegarLoop]: Abstraction has 7065 states and 21495 transitions. [2021-06-12 22:23:28,874 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:23:28,874 INFO L276 IsEmpty]: Start isEmpty. Operand 7065 states and 21495 transitions. [2021-06-12 22:23:28,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-12 22:23:28,918 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:23:28,918 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:23:29,118 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:23:29,118 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:23:29,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:23:29,119 INFO L82 PathProgramCache]: Analyzing trace with hash -552776474, now seen corresponding path program 27 times [2021-06-12 22:23:29,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:23:29,119 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033677063] [2021-06-12 22:23:29,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:23:29,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:23:29,517 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:23:29,517 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:23:29,518 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033677063] [2021-06-12 22:23:29,518 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1033677063] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:23:29,518 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [170428909] [2021-06-12 22:23:29,518 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:23:29,550 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 22:23:29,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:23:29,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-12 22:23:29,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:23:29,674 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:23:29,674 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:23:29,687 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:23:29,687 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:23:29,687 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-12 22:23:29,845 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-12 22:23:29,846 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:23:29,862 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:23:29,863 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:23:29,863 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:32 [2021-06-12 22:23:30,252 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:23:30,253 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [170428909] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:23:30,253 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:23:30,253 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-12 22:23:30,253 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236041735] [2021-06-12 22:23:30,253 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-12 22:23:30,253 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:23:30,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-12 22:23:30,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1362, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 22:23:30,253 INFO L87 Difference]: Start difference. First operand 7065 states and 21495 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:23:32,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:23:32,247 INFO L93 Difference]: Finished difference Result 9460 states and 28410 transitions. [2021-06-12 22:23:32,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-12 22:23:32,247 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-12 22:23:32,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:23:32,259 INFO L225 Difference]: With dead ends: 9460 [2021-06-12 22:23:32,259 INFO L226 Difference]: Without dead ends: 9316 [2021-06-12 22:23:32,260 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 930 ImplicationChecksByTransitivity, 1812.5ms TimeCoverageRelationStatistics Valid=263, Invalid=3277, Unknown=0, NotChecked=0, Total=3540 [2021-06-12 22:23:32,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9316 states. [2021-06-12 22:23:32,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9316 to 7131. [2021-06-12 22:23:32,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7131 states, 7130 states have (on average 3.038849929873773) internal successors, (21667), 7130 states have internal predecessors, (21667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:23:32,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7131 states to 7131 states and 21667 transitions. [2021-06-12 22:23:32,359 INFO L78 Accepts]: Start accepts. Automaton has 7131 states and 21667 transitions. Word has length 48 [2021-06-12 22:23:32,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:23:32,359 INFO L482 AbstractCegarLoop]: Abstraction has 7131 states and 21667 transitions. [2021-06-12 22:23:32,359 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:23:32,359 INFO L276 IsEmpty]: Start isEmpty. Operand 7131 states and 21667 transitions. [2021-06-12 22:23:32,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-12 22:23:32,367 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:23:32,367 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:23:32,572 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable116 [2021-06-12 22:23:32,573 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:23:32,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:23:32,573 INFO L82 PathProgramCache]: Analyzing trace with hash -445326106, now seen corresponding path program 28 times [2021-06-12 22:23:32,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:23:32,573 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855307025] [2021-06-12 22:23:32,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:23:32,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:23:32,967 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:23:32,967 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:23:32,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855307025] [2021-06-12 22:23:32,967 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855307025] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:23:32,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [768169119] [2021-06-12 22:23:32,967 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:23:32,999 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:23:32,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:23:33,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-12 22:23:33,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:23:33,128 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:23:33,128 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:23:33,141 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:23:33,141 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:23:33,141 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-12 22:23:33,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-12 22:23:33,294 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:23:33,305 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:23:33,305 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:23:33,305 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:32 [2021-06-12 22:23:33,709 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:23:33,709 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [768169119] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:23:33,709 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:23:33,709 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-12 22:23:33,709 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714150008] [2021-06-12 22:23:33,709 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-12 22:23:33,709 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:23:33,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-12 22:23:33,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1364, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 22:23:33,709 INFO L87 Difference]: Start difference. First operand 7131 states and 21667 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:23:35,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:23:35,932 INFO L93 Difference]: Finished difference Result 8160 states and 24665 transitions. [2021-06-12 22:23:35,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-12 22:23:35,932 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-12 22:23:35,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:23:35,943 INFO L225 Difference]: With dead ends: 8160 [2021-06-12 22:23:35,943 INFO L226 Difference]: Without dead ends: 8120 [2021-06-12 22:23:35,943 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 967 ImplicationChecksByTransitivity, 2029.7ms TimeCoverageRelationStatistics Valid=302, Invalid=3480, Unknown=0, NotChecked=0, Total=3782 [2021-06-12 22:23:35,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8120 states. [2021-06-12 22:23:36,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8120 to 7188. [2021-06-12 22:23:36,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7188 states, 7187 states have (on average 3.0333936273827744) internal successors, (21801), 7187 states have internal predecessors, (21801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:23:36,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7188 states to 7188 states and 21801 transitions. [2021-06-12 22:23:36,032 INFO L78 Accepts]: Start accepts. Automaton has 7188 states and 21801 transitions. Word has length 48 [2021-06-12 22:23:36,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:23:36,032 INFO L482 AbstractCegarLoop]: Abstraction has 7188 states and 21801 transitions. [2021-06-12 22:23:36,032 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:23:36,032 INFO L276 IsEmpty]: Start isEmpty. Operand 7188 states and 21801 transitions. [2021-06-12 22:23:36,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-12 22:23:36,039 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:23:36,039 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:23:36,240 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:23:36,240 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:23:36,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:23:36,240 INFO L82 PathProgramCache]: Analyzing trace with hash -1321508570, now seen corresponding path program 29 times [2021-06-12 22:23:36,240 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:23:36,240 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668461846] [2021-06-12 22:23:36,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:23:36,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:23:36,672 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:23:36,672 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:23:36,672 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668461846] [2021-06-12 22:23:36,672 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1668461846] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:23:36,672 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1016693532] [2021-06-12 22:23:36,672 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:23:36,705 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 22:23:36,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:23:36,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-12 22:23:36,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:23:36,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:23:36,832 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:23:36,845 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:23:36,845 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:23:36,845 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-12 22:23:36,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:23:37,000 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:23:37,011 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:23:37,012 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:23:37,012 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-06-12 22:23:37,412 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:23:37,413 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1016693532] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:23:37,413 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:23:37,413 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-12 22:23:37,413 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150502326] [2021-06-12 22:23:37,413 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-12 22:23:37,413 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:23:37,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-12 22:23:37,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1362, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 22:23:37,413 INFO L87 Difference]: Start difference. First operand 7188 states and 21801 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:23:39,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:23:39,424 INFO L93 Difference]: Finished difference Result 9461 states and 28427 transitions. [2021-06-12 22:23:39,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-12 22:23:39,424 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-12 22:23:39,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:23:39,435 INFO L225 Difference]: With dead ends: 9461 [2021-06-12 22:23:39,436 INFO L226 Difference]: Without dead ends: 9422 [2021-06-12 22:23:39,436 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 926 ImplicationChecksByTransitivity, 1847.0ms TimeCoverageRelationStatistics Valid=264, Invalid=3276, Unknown=0, NotChecked=0, Total=3540 [2021-06-12 22:23:39,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9422 states. [2021-06-12 22:23:39,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9422 to 7184. [2021-06-12 22:23:39,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7184 states, 7183 states have (on average 3.03355144090213) internal successors, (21790), 7183 states have internal predecessors, (21790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:23:39,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7184 states to 7184 states and 21790 transitions. [2021-06-12 22:23:39,532 INFO L78 Accepts]: Start accepts. Automaton has 7184 states and 21790 transitions. Word has length 48 [2021-06-12 22:23:39,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:23:39,533 INFO L482 AbstractCegarLoop]: Abstraction has 7184 states and 21790 transitions. [2021-06-12 22:23:39,533 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:23:39,533 INFO L276 IsEmpty]: Start isEmpty. Operand 7184 states and 21790 transitions. [2021-06-12 22:23:39,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-12 22:23:39,540 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:23:39,540 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:23:39,740 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2021-06-12 22:23:39,740 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:23:39,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:23:39,741 INFO L82 PathProgramCache]: Analyzing trace with hash -1179793430, now seen corresponding path program 30 times [2021-06-12 22:23:39,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:23:39,741 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395313649] [2021-06-12 22:23:39,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:23:39,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:23:40,143 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:23:40,144 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:23:40,144 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395313649] [2021-06-12 22:23:40,144 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395313649] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:23:40,144 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1466560162] [2021-06-12 22:23:40,144 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:23:40,177 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 22:23:40,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:23:40,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-12 22:23:40,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:23:40,299 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:23:40,300 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:23:40,312 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:23:40,312 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:23:40,313 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-12 22:23:40,467 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:23:40,468 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:23:40,479 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:23:40,480 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:23:40,480 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-06-12 22:23:40,870 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:23:40,870 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1466560162] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:23:40,870 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:23:40,870 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-12 22:23:40,870 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532266862] [2021-06-12 22:23:40,870 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-12 22:23:40,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:23:40,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-12 22:23:40,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1362, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 22:23:40,871 INFO L87 Difference]: Start difference. First operand 7184 states and 21790 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:23:42,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:23:42,504 INFO L93 Difference]: Finished difference Result 9490 states and 28434 transitions. [2021-06-12 22:23:42,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-12 22:23:42,505 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-12 22:23:42,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:23:42,517 INFO L225 Difference]: With dead ends: 9490 [2021-06-12 22:23:42,518 INFO L226 Difference]: Without dead ends: 9433 [2021-06-12 22:23:42,518 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 893 ImplicationChecksByTransitivity, 1772.2ms TimeCoverageRelationStatistics Valid=258, Invalid=3164, Unknown=0, NotChecked=0, Total=3422 [2021-06-12 22:23:42,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9433 states. [2021-06-12 22:23:42,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9433 to 7190. [2021-06-12 22:23:42,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7190 states, 7189 states have (on average 3.032827931562109) internal successors, (21803), 7189 states have internal predecessors, (21803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:23:42,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7190 states to 7190 states and 21803 transitions. [2021-06-12 22:23:42,616 INFO L78 Accepts]: Start accepts. Automaton has 7190 states and 21803 transitions. Word has length 48 [2021-06-12 22:23:42,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:23:42,616 INFO L482 AbstractCegarLoop]: Abstraction has 7190 states and 21803 transitions. [2021-06-12 22:23:42,616 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:23:42,616 INFO L276 IsEmpty]: Start isEmpty. Operand 7190 states and 21803 transitions. [2021-06-12 22:23:42,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-12 22:23:42,623 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:23:42,623 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:23:42,823 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:23:42,824 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:23:42,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:23:42,824 INFO L82 PathProgramCache]: Analyzing trace with hash 1832026406, now seen corresponding path program 31 times [2021-06-12 22:23:42,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:23:42,824 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688038257] [2021-06-12 22:23:42,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:23:42,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:23:43,248 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:23:43,248 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:23:43,248 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688038257] [2021-06-12 22:23:43,248 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [688038257] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:23:43,248 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1295237821] [2021-06-12 22:23:43,248 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:23:43,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:23:43,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-12 22:23:43,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:23:43,403 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:23:43,404 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:23:43,417 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:23:43,417 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:23:43,417 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-12 22:23:43,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-12 22:23:43,569 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:23:43,580 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:23:43,581 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:23:43,581 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:32 [2021-06-12 22:23:44,007 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:23:44,007 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1295237821] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:23:44,007 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:23:44,007 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-12 22:23:44,007 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175090049] [2021-06-12 22:23:44,007 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-12 22:23:44,007 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:23:44,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-12 22:23:44,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1362, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 22:23:44,008 INFO L87 Difference]: Start difference. First operand 7190 states and 21803 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:23:46,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:23:46,035 INFO L93 Difference]: Finished difference Result 9445 states and 28338 transitions. [2021-06-12 22:23:46,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-12 22:23:46,035 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-12 22:23:46,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:23:46,047 INFO L225 Difference]: With dead ends: 9445 [2021-06-12 22:23:46,047 INFO L226 Difference]: Without dead ends: 9351 [2021-06-12 22:23:46,047 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1004 ImplicationChecksByTransitivity, 1966.8ms TimeCoverageRelationStatistics Valid=279, Invalid=3503, Unknown=0, NotChecked=0, Total=3782 [2021-06-12 22:23:46,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9351 states. [2021-06-12 22:23:46,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9351 to 7170. [2021-06-12 22:23:46,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7170 states, 7169 states have (on average 3.0352908355419164) internal successors, (21760), 7169 states have internal predecessors, (21760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:23:46,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7170 states to 7170 states and 21760 transitions. [2021-06-12 22:23:46,144 INFO L78 Accepts]: Start accepts. Automaton has 7170 states and 21760 transitions. Word has length 48 [2021-06-12 22:23:46,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:23:46,144 INFO L482 AbstractCegarLoop]: Abstraction has 7170 states and 21760 transitions. [2021-06-12 22:23:46,144 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:23:46,144 INFO L276 IsEmpty]: Start isEmpty. Operand 7170 states and 21760 transitions. [2021-06-12 22:23:46,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-12 22:23:46,151 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:23:46,151 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:23:46,351 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:23:46,352 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:23:46,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:23:46,352 INFO L82 PathProgramCache]: Analyzing trace with hash -800334080, now seen corresponding path program 32 times [2021-06-12 22:23:46,352 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:23:46,352 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616550868] [2021-06-12 22:23:46,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:23:46,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:23:46,783 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:23:46,784 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:23:46,784 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616550868] [2021-06-12 22:23:46,784 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616550868] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:23:46,784 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824180890] [2021-06-12 22:23:46,784 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:23:46,816 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:23:46,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:23:46,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-12 22:23:46,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:23:46,938 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-12 22:23:46,939 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:23:46,951 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:23:46,952 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:23:46,952 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:31 [2021-06-12 22:23:47,102 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:23:47,103 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:23:47,114 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:23:47,114 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:23:47,114 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-06-12 22:23:47,582 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:23:47,583 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [824180890] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:23:47,583 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:23:47,583 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22] total 40 [2021-06-12 22:23:47,583 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168959662] [2021-06-12 22:23:47,583 INFO L462 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-06-12 22:23:47,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:23:47,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-06-12 22:23:47,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=1510, Unknown=0, NotChecked=0, Total=1640 [2021-06-12 22:23:47,584 INFO L87 Difference]: Start difference. First operand 7170 states and 21760 transitions. Second operand has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:23:50,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:23:50,091 INFO L93 Difference]: Finished difference Result 9619 states and 28817 transitions. [2021-06-12 22:23:50,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-12 22:23:50,092 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-12 22:23:50,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:23:50,103 INFO L225 Difference]: With dead ends: 9619 [2021-06-12 22:23:50,103 INFO L226 Difference]: Without dead ends: 9488 [2021-06-12 22:23:50,104 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1213 ImplicationChecksByTransitivity, 2090.2ms TimeCoverageRelationStatistics Valid=324, Invalid=4098, Unknown=0, NotChecked=0, Total=4422 [2021-06-12 22:23:50,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9488 states. [2021-06-12 22:23:50,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9488 to 7230. [2021-06-12 22:23:50,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7230 states, 7229 states have (on average 3.028911329367824) internal successors, (21896), 7229 states have internal predecessors, (21896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:23:50,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7230 states to 7230 states and 21896 transitions. [2021-06-12 22:23:50,220 INFO L78 Accepts]: Start accepts. Automaton has 7230 states and 21896 transitions. Word has length 48 [2021-06-12 22:23:50,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:23:50,220 INFO L482 AbstractCegarLoop]: Abstraction has 7230 states and 21896 transitions. [2021-06-12 22:23:50,220 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:23:50,220 INFO L276 IsEmpty]: Start isEmpty. Operand 7230 states and 21896 transitions. [2021-06-12 22:23:50,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-12 22:23:50,227 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:23:50,227 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:23:50,428 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable121 [2021-06-12 22:23:50,428 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:23:50,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:23:50,428 INFO L82 PathProgramCache]: Analyzing trace with hash -774265204, now seen corresponding path program 33 times [2021-06-12 22:23:50,428 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:23:50,428 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852846216] [2021-06-12 22:23:50,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:23:50,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:23:50,830 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:23:50,830 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:23:50,830 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852846216] [2021-06-12 22:23:50,830 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852846216] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:23:50,830 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [178468488] [2021-06-12 22:23:50,830 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:23:50,863 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 22:23:50,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:23:50,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-12 22:23:50,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:23:50,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:23:50,990 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:23:51,002 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:23:51,003 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:23:51,003 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-12 22:23:51,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-12 22:23:51,167 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:23:51,178 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:23:51,179 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:23:51,179 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:32 [2021-06-12 22:23:51,626 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:23:51,627 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [178468488] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:23:51,627 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:23:51,627 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-12 22:23:51,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574251894] [2021-06-12 22:23:51,627 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-12 22:23:51,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:23:51,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-12 22:23:51,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1364, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 22:23:51,627 INFO L87 Difference]: Start difference. First operand 7230 states and 21896 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:23:53,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:23:53,631 INFO L93 Difference]: Finished difference Result 8421 states and 25360 transitions. [2021-06-12 22:23:53,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-12 22:23:53,631 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-12 22:23:53,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:23:53,641 INFO L225 Difference]: With dead ends: 8421 [2021-06-12 22:23:53,641 INFO L226 Difference]: Without dead ends: 8381 [2021-06-12 22:23:53,642 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 932 ImplicationChecksByTransitivity, 2079.8ms TimeCoverageRelationStatistics Valid=290, Invalid=3370, Unknown=0, NotChecked=0, Total=3660 [2021-06-12 22:23:53,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8381 states. [2021-06-12 22:23:53,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8381 to 7308. [2021-06-12 22:23:53,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7308 states, 7307 states have (on average 3.0213493909949363) internal successors, (22077), 7307 states have internal predecessors, (22077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:23:53,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7308 states to 7308 states and 22077 transitions. [2021-06-12 22:23:53,757 INFO L78 Accepts]: Start accepts. Automaton has 7308 states and 22077 transitions. Word has length 48 [2021-06-12 22:23:53,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:23:53,757 INFO L482 AbstractCegarLoop]: Abstraction has 7308 states and 22077 transitions. [2021-06-12 22:23:53,758 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:23:53,758 INFO L276 IsEmpty]: Start isEmpty. Operand 7308 states and 22077 transitions. [2021-06-12 22:23:53,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-12 22:23:53,765 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:23:53,765 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:23:53,965 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2021-06-12 22:23:53,965 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:23:53,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:23:53,966 INFO L82 PathProgramCache]: Analyzing trace with hash -1003024048, now seen corresponding path program 34 times [2021-06-12 22:23:53,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:23:53,966 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303646863] [2021-06-12 22:23:53,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:23:53,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:23:54,364 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:23:54,365 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:23:54,365 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303646863] [2021-06-12 22:23:54,365 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [303646863] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:23:54,365 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [248225694] [2021-06-12 22:23:54,365 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:23:54,428 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:23:54,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:23:54,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-12 22:23:54,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:23:54,604 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:23:54,605 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:23:54,622 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:23:54,623 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:23:54,623 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-12 22:23:54,787 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-12 22:23:54,787 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:23:54,798 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:23:54,799 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:23:54,799 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:32 [2021-06-12 22:23:55,196 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:23:55,196 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [248225694] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:23:55,196 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:23:55,196 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-12 22:23:55,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653124075] [2021-06-12 22:23:55,196 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-12 22:23:55,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:23:55,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-12 22:23:55,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1362, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 22:23:55,197 INFO L87 Difference]: Start difference. First operand 7308 states and 22077 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:23:56,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:23:56,755 INFO L93 Difference]: Finished difference Result 9567 states and 28663 transitions. [2021-06-12 22:23:56,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-12 22:23:56,756 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-12 22:23:56,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:23:56,767 INFO L225 Difference]: With dead ends: 9567 [2021-06-12 22:23:56,767 INFO L226 Difference]: Without dead ends: 9522 [2021-06-12 22:23:56,767 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 926 ImplicationChecksByTransitivity, 1872.5ms TimeCoverageRelationStatistics Valid=264, Invalid=3276, Unknown=0, NotChecked=0, Total=3540 [2021-06-12 22:23:56,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9522 states. [2021-06-12 22:23:56,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9522 to 7302. [2021-06-12 22:23:56,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7302 states, 7301 states have (on average 3.021229968497466) internal successors, (22058), 7301 states have internal predecessors, (22058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:23:56,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7302 states to 7302 states and 22058 transitions. [2021-06-12 22:23:56,865 INFO L78 Accepts]: Start accepts. Automaton has 7302 states and 22058 transitions. Word has length 48 [2021-06-12 22:23:56,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:23:56,865 INFO L482 AbstractCegarLoop]: Abstraction has 7302 states and 22058 transitions. [2021-06-12 22:23:56,865 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:23:56,865 INFO L276 IsEmpty]: Start isEmpty. Operand 7302 states and 22058 transitions. [2021-06-12 22:23:56,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-12 22:23:56,872 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:23:56,873 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:23:57,073 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:23:57,073 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:23:57,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:23:57,073 INFO L82 PathProgramCache]: Analyzing trace with hash -1949755848, now seen corresponding path program 35 times [2021-06-12 22:23:57,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:23:57,074 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236850660] [2021-06-12 22:23:57,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:23:57,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:23:57,481 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:23:57,481 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:23:57,481 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236850660] [2021-06-12 22:23:57,481 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236850660] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:23:57,481 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598382169] [2021-06-12 22:23:57,481 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:23:57,514 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 22:23:57,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:23:57,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-12 22:23:57,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:23:57,640 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:23:57,641 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:23:57,653 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:23:57,654 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:23:57,654 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-12 22:23:57,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:23:57,806 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:23:57,817 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:23:57,817 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:23:57,817 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-06-12 22:23:58,209 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:23:58,209 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [598382169] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:23:58,209 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:23:58,209 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-12 22:23:58,209 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804730688] [2021-06-12 22:23:58,209 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-12 22:23:58,209 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:23:58,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-12 22:23:58,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1362, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 22:23:58,210 INFO L87 Difference]: Start difference. First operand 7302 states and 22058 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:24:00,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:24:00,086 INFO L93 Difference]: Finished difference Result 9656 states and 28797 transitions. [2021-06-12 22:24:00,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-12 22:24:00,086 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-12 22:24:00,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:24:00,098 INFO L225 Difference]: With dead ends: 9656 [2021-06-12 22:24:00,098 INFO L226 Difference]: Without dead ends: 9597 [2021-06-12 22:24:00,099 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 893 ImplicationChecksByTransitivity, 1783.2ms TimeCoverageRelationStatistics Valid=258, Invalid=3164, Unknown=0, NotChecked=0, Total=3422 [2021-06-12 22:24:00,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9597 states. [2021-06-12 22:24:00,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9597 to 7308. [2021-06-12 22:24:00,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7308 states, 7307 states have (on average 3.0205282605720543) internal successors, (22071), 7307 states have internal predecessors, (22071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:24:00,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7308 states to 7308 states and 22071 transitions. [2021-06-12 22:24:00,198 INFO L78 Accepts]: Start accepts. Automaton has 7308 states and 22071 transitions. Word has length 48 [2021-06-12 22:24:00,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:24:00,198 INFO L482 AbstractCegarLoop]: Abstraction has 7308 states and 22071 transitions. [2021-06-12 22:24:00,198 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:24:00,199 INFO L276 IsEmpty]: Start isEmpty. Operand 7308 states and 22071 transitions. [2021-06-12 22:24:00,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-12 22:24:00,206 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:24:00,206 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:24:00,407 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2021-06-12 22:24:00,407 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:24:00,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:24:00,408 INFO L82 PathProgramCache]: Analyzing trace with hash -2104193366, now seen corresponding path program 36 times [2021-06-12 22:24:00,408 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:24:00,408 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605732553] [2021-06-12 22:24:00,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:24:00,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:24:00,805 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:24:00,805 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:24:00,805 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605732553] [2021-06-12 22:24:00,805 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605732553] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:24:00,805 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [549637758] [2021-06-12 22:24:00,806 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:24:00,839 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 22:24:00,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:24:00,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-12 22:24:00,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:24:00,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:24:00,965 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:24:00,978 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:24:00,978 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:24:00,978 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-12 22:24:01,137 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:24:01,138 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:24:01,153 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:24:01,154 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:24:01,154 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-06-12 22:24:01,599 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:24:01,599 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [549637758] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:24:01,599 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:24:01,599 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-12 22:24:01,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474731268] [2021-06-12 22:24:01,599 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-12 22:24:01,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:24:01,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-12 22:24:01,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1362, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 22:24:01,600 INFO L87 Difference]: Start difference. First operand 7308 states and 22071 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:24:03,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:24:03,648 INFO L93 Difference]: Finished difference Result 9603 states and 28684 transitions. [2021-06-12 22:24:03,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-12 22:24:03,648 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-12 22:24:03,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:24:03,660 INFO L225 Difference]: With dead ends: 9603 [2021-06-12 22:24:03,660 INFO L226 Difference]: Without dead ends: 9447 [2021-06-12 22:24:03,660 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1004 ImplicationChecksByTransitivity, 1967.7ms TimeCoverageRelationStatistics Valid=279, Invalid=3503, Unknown=0, NotChecked=0, Total=3782 [2021-06-12 22:24:03,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9447 states. [2021-06-12 22:24:03,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9447 to 7242. [2021-06-12 22:24:03,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7242 states, 7241 states have (on average 3.0247203424941307) internal successors, (21902), 7241 states have internal predecessors, (21902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:24:03,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7242 states to 7242 states and 21902 transitions. [2021-06-12 22:24:03,783 INFO L78 Accepts]: Start accepts. Automaton has 7242 states and 21902 transitions. Word has length 48 [2021-06-12 22:24:03,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:24:03,783 INFO L482 AbstractCegarLoop]: Abstraction has 7242 states and 21902 transitions. [2021-06-12 22:24:03,783 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:24:03,783 INFO L276 IsEmpty]: Start isEmpty. Operand 7242 states and 21902 transitions. [2021-06-12 22:24:03,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-12 22:24:03,790 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:24:03,790 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:24:03,991 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:24:03,991 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:24:03,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:24:03,991 INFO L82 PathProgramCache]: Analyzing trace with hash 667386560, now seen corresponding path program 37 times [2021-06-12 22:24:03,991 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:24:03,991 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842366940] [2021-06-12 22:24:03,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:24:03,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:24:04,386 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:24:04,386 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:24:04,386 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842366940] [2021-06-12 22:24:04,386 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [842366940] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:24:04,386 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1683255715] [2021-06-12 22:24:04,387 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:24:04,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:24:04,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-12 22:24:04,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:24:04,542 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:24:04,543 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:24:04,558 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:24:04,559 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:24:04,559 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-12 22:24:04,712 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-12 22:24:04,713 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:24:04,724 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:24:04,724 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:24:04,724 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:32 [2021-06-12 22:24:05,137 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:24:05,137 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1683255715] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:24:05,137 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:24:05,138 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-12 22:24:05,138 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188245483] [2021-06-12 22:24:05,138 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-12 22:24:05,138 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:24:05,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-12 22:24:05,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1364, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 22:24:05,138 INFO L87 Difference]: Start difference. First operand 7242 states and 21902 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:24:07,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:24:07,020 INFO L93 Difference]: Finished difference Result 8226 states and 24795 transitions. [2021-06-12 22:24:07,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-12 22:24:07,021 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-12 22:24:07,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:24:07,031 INFO L225 Difference]: With dead ends: 8226 [2021-06-12 22:24:07,031 INFO L226 Difference]: Without dead ends: 8186 [2021-06-12 22:24:07,031 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 911 ImplicationChecksByTransitivity, 2112.1ms TimeCoverageRelationStatistics Valid=314, Invalid=3346, Unknown=0, NotChecked=0, Total=3660 [2021-06-12 22:24:07,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8186 states. [2021-06-12 22:24:07,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8186 to 7250. [2021-06-12 22:24:07,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7250 states, 7249 states have (on average 3.02400331080149) internal successors, (21921), 7249 states have internal predecessors, (21921), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:24:07,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7250 states to 7250 states and 21921 transitions. [2021-06-12 22:24:07,115 INFO L78 Accepts]: Start accepts. Automaton has 7250 states and 21921 transitions. Word has length 48 [2021-06-12 22:24:07,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:24:07,115 INFO L482 AbstractCegarLoop]: Abstraction has 7250 states and 21921 transitions. [2021-06-12 22:24:07,115 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:24:07,115 INFO L276 IsEmpty]: Start isEmpty. Operand 7250 states and 21921 transitions. [2021-06-12 22:24:07,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-12 22:24:07,123 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:24:07,123 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:24:07,324 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable126 [2021-06-12 22:24:07,324 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:24:07,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:24:07,324 INFO L82 PathProgramCache]: Analyzing trace with hash -208795904, now seen corresponding path program 38 times [2021-06-12 22:24:07,324 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:24:07,325 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348507108] [2021-06-12 22:24:07,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:24:07,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:24:07,723 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:24:07,723 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:24:07,723 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348507108] [2021-06-12 22:24:07,723 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1348507108] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:24:07,723 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [947623015] [2021-06-12 22:24:07,723 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:24:07,756 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:24:07,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:24:07,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-12 22:24:07,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:24:07,880 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:24:07,881 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:24:07,893 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:24:07,894 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:24:07,894 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-12 22:24:08,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:24:08,048 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:24:08,059 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:24:08,059 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:24:08,059 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-06-12 22:24:08,469 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:24:08,470 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [947623015] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:24:08,470 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:24:08,470 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-12 22:24:08,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002322509] [2021-06-12 22:24:08,470 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-12 22:24:08,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:24:08,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-12 22:24:08,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1364, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 22:24:08,471 INFO L87 Difference]: Start difference. First operand 7250 states and 21921 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:24:10,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:24:10,705 INFO L93 Difference]: Finished difference Result 8192 states and 24726 transitions. [2021-06-12 22:24:10,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-12 22:24:10,705 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-12 22:24:10,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:24:10,716 INFO L225 Difference]: With dead ends: 8192 [2021-06-12 22:24:10,716 INFO L226 Difference]: Without dead ends: 8153 [2021-06-12 22:24:10,717 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 892 ImplicationChecksByTransitivity, 1978.2ms TimeCoverageRelationStatistics Valid=289, Invalid=3251, Unknown=0, NotChecked=0, Total=3540 [2021-06-12 22:24:10,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8153 states. [2021-06-12 22:24:10,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8153 to 7246. [2021-06-12 22:24:10,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7246 states, 7245 states have (on average 3.024568668046929) internal successors, (21913), 7245 states have internal predecessors, (21913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:24:10,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7246 states to 7246 states and 21913 transitions. [2021-06-12 22:24:10,809 INFO L78 Accepts]: Start accepts. Automaton has 7246 states and 21913 transitions. Word has length 48 [2021-06-12 22:24:10,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:24:10,809 INFO L482 AbstractCegarLoop]: Abstraction has 7246 states and 21913 transitions. [2021-06-12 22:24:10,810 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:24:10,810 INFO L276 IsEmpty]: Start isEmpty. Operand 7246 states and 21913 transitions. [2021-06-12 22:24:10,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-12 22:24:10,817 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:24:10,818 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:24:11,020 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127,125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:24:11,021 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:24:11,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:24:11,021 INFO L82 PathProgramCache]: Analyzing trace with hash 1035251456, now seen corresponding path program 39 times [2021-06-12 22:24:11,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:24:11,021 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679723603] [2021-06-12 22:24:11,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:24:11,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:24:11,461 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:24:11,462 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:24:11,462 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679723603] [2021-06-12 22:24:11,462 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [679723603] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:24:11,462 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [656160421] [2021-06-12 22:24:11,462 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:24:11,496 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 22:24:11,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:24:11,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-12 22:24:11,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:24:11,619 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:24:11,620 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:24:11,632 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:24:11,633 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:24:11,633 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-12 22:24:11,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:24:11,865 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:24:11,876 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:24:11,876 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:24:11,876 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-06-12 22:24:12,388 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:24:12,388 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [656160421] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:24:12,388 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:24:12,388 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 24] total 42 [2021-06-12 22:24:12,388 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141204701] [2021-06-12 22:24:12,388 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-06-12 22:24:12,389 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:24:12,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-06-12 22:24:12,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=1664, Unknown=0, NotChecked=0, Total=1806 [2021-06-12 22:24:12,389 INFO L87 Difference]: Start difference. First operand 7246 states and 21913 transitions. Second operand has 43 states, 43 states have (on average 2.046511627906977) internal successors, (88), 42 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:24:14,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:24:14,964 INFO L93 Difference]: Finished difference Result 9725 states and 29350 transitions. [2021-06-12 22:24:14,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-12 22:24:14,964 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.046511627906977) internal successors, (88), 42 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-12 22:24:14,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:24:14,977 INFO L225 Difference]: With dead ends: 9725 [2021-06-12 22:24:14,978 INFO L226 Difference]: Without dead ends: 9685 [2021-06-12 22:24:14,978 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1271 ImplicationChecksByTransitivity, 2561.6ms TimeCoverageRelationStatistics Valid=399, Invalid=4293, Unknown=0, NotChecked=0, Total=4692 [2021-06-12 22:24:14,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9685 states. [2021-06-12 22:24:15,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9685 to 7252. [2021-06-12 22:24:15,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7252 states, 7251 states have (on average 3.0238587780995725) internal successors, (21926), 7251 states have internal predecessors, (21926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:24:15,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7252 states to 7252 states and 21926 transitions. [2021-06-12 22:24:15,073 INFO L78 Accepts]: Start accepts. Automaton has 7252 states and 21926 transitions. Word has length 48 [2021-06-12 22:24:15,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:24:15,073 INFO L482 AbstractCegarLoop]: Abstraction has 7252 states and 21926 transitions. [2021-06-12 22:24:15,073 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 2.046511627906977) internal successors, (88), 42 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:24:15,073 INFO L276 IsEmpty]: Start isEmpty. Operand 7252 states and 21926 transitions. [2021-06-12 22:24:15,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-12 22:24:15,081 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:24:15,081 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:24:15,281 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2021-06-12 22:24:15,281 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:24:15,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:24:15,282 INFO L82 PathProgramCache]: Analyzing trace with hash -1496045910, now seen corresponding path program 40 times [2021-06-12 22:24:15,282 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:24:15,282 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138554036] [2021-06-12 22:24:15,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:24:15,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:24:15,677 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:24:15,678 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:24:15,678 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138554036] [2021-06-12 22:24:15,678 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138554036] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:24:15,678 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [995453378] [2021-06-12 22:24:15,678 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:24:15,713 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:24:15,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:24:15,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-12 22:24:15,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:24:15,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:24:15,839 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:24:15,852 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:24:15,852 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:24:15,852 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-12 22:24:16,005 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-12 22:24:16,006 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:24:16,017 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:24:16,018 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:24:16,018 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:32 [2021-06-12 22:24:16,461 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:24:16,462 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [995453378] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:24:16,462 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:24:16,462 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-12 22:24:16,462 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170244324] [2021-06-12 22:24:16,462 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-12 22:24:16,462 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:24:16,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-12 22:24:16,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1364, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 22:24:16,463 INFO L87 Difference]: Start difference. First operand 7252 states and 21926 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:24:18,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:24:18,354 INFO L93 Difference]: Finished difference Result 8202 states and 24747 transitions. [2021-06-12 22:24:18,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-12 22:24:18,354 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-12 22:24:18,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:24:18,365 INFO L225 Difference]: With dead ends: 8202 [2021-06-12 22:24:18,365 INFO L226 Difference]: Without dead ends: 8157 [2021-06-12 22:24:18,365 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 892 ImplicationChecksByTransitivity, 1951.7ms TimeCoverageRelationStatistics Valid=289, Invalid=3251, Unknown=0, NotChecked=0, Total=3540 [2021-06-12 22:24:18,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8157 states. [2021-06-12 22:24:18,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8157 to 7246. [2021-06-12 22:24:18,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7246 states, 7245 states have (on average 3.0242926155969636) internal successors, (21911), 7245 states have internal predecessors, (21911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:24:18,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7246 states to 7246 states and 21911 transitions. [2021-06-12 22:24:18,504 INFO L78 Accepts]: Start accepts. Automaton has 7246 states and 21911 transitions. Word has length 48 [2021-06-12 22:24:18,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:24:18,504 INFO L482 AbstractCegarLoop]: Abstraction has 7246 states and 21911 transitions. [2021-06-12 22:24:18,504 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:24:18,504 INFO L276 IsEmpty]: Start isEmpty. Operand 7246 states and 21911 transitions. [2021-06-12 22:24:18,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-12 22:24:18,513 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:24:18,513 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:24:18,714 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2021-06-12 22:24:18,714 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:24:18,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:24:18,714 INFO L82 PathProgramCache]: Analyzing trace with hash -1435749568, now seen corresponding path program 41 times [2021-06-12 22:24:18,714 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:24:18,714 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064957278] [2021-06-12 22:24:18,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:24:18,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:24:19,106 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:24:19,106 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:24:19,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064957278] [2021-06-12 22:24:19,106 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1064957278] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:24:19,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1296169529] [2021-06-12 22:24:19,106 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:24:19,141 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 22:24:19,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:24:19,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 44 conjunts are in the unsatisfiable core [2021-06-12 22:24:19,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:24:19,263 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:24:19,264 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:24:19,276 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:24:19,277 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:24:19,277 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-12 22:24:19,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-12 22:24:19,430 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:24:19,441 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:24:19,442 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:24:19,442 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:32 [2021-06-12 22:24:19,839 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:24:19,839 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1296169529] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:24:19,839 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:24:19,839 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-12 22:24:19,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950128304] [2021-06-12 22:24:19,839 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-12 22:24:19,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:24:19,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-12 22:24:19,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1362, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 22:24:19,840 INFO L87 Difference]: Start difference. First operand 7246 states and 21911 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:24:21,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:24:21,695 INFO L93 Difference]: Finished difference Result 9505 states and 28499 transitions. [2021-06-12 22:24:21,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-12 22:24:21,695 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-12 22:24:21,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:24:21,707 INFO L225 Difference]: With dead ends: 9505 [2021-06-12 22:24:21,707 INFO L226 Difference]: Without dead ends: 9470 [2021-06-12 22:24:21,707 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 889 ImplicationChecksByTransitivity, 1775.3ms TimeCoverageRelationStatistics Valid=260, Invalid=3162, Unknown=0, NotChecked=0, Total=3422 [2021-06-12 22:24:21,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9470 states. [2021-06-12 22:24:21,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9470 to 7250. [2021-06-12 22:24:21,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7250 states, 7249 states have (on average 3.023727410677335) internal successors, (21919), 7249 states have internal predecessors, (21919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:24:21,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7250 states to 7250 states and 21919 transitions. [2021-06-12 22:24:21,807 INFO L78 Accepts]: Start accepts. Automaton has 7250 states and 21919 transitions. Word has length 48 [2021-06-12 22:24:21,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:24:21,807 INFO L482 AbstractCegarLoop]: Abstraction has 7250 states and 21919 transitions. [2021-06-12 22:24:21,807 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:24:21,807 INFO L276 IsEmpty]: Start isEmpty. Operand 7250 states and 21919 transitions. [2021-06-12 22:24:21,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-12 22:24:21,814 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:24:21,814 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:24:22,015 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,128 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:24:22,015 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:24:22,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:24:22,015 INFO L82 PathProgramCache]: Analyzing trace with hash -2043187328, now seen corresponding path program 42 times [2021-06-12 22:24:22,015 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:24:22,015 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547911112] [2021-06-12 22:24:22,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:24:22,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:24:22,413 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:24:22,413 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:24:22,413 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547911112] [2021-06-12 22:24:22,413 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1547911112] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:24:22,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2015578494] [2021-06-12 22:24:22,414 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:24:22,453 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 22:24:22,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:24:22,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 44 conjunts are in the unsatisfiable core [2021-06-12 22:24:22,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:24:22,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:24:22,581 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:24:22,594 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:24:22,594 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:24:22,594 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-12 22:24:22,747 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:24:22,748 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:24:22,759 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:24:22,760 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:24:22,760 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-06-12 22:24:23,229 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:24:23,229 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2015578494] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:24:23,229 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:24:23,229 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22] total 40 [2021-06-12 22:24:23,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373457064] [2021-06-12 22:24:23,230 INFO L462 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-06-12 22:24:23,230 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:24:23,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-06-12 22:24:23,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=1510, Unknown=0, NotChecked=0, Total=1640 [2021-06-12 22:24:23,230 INFO L87 Difference]: Start difference. First operand 7250 states and 21919 transitions. Second operand has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:24:25,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:24:25,042 INFO L93 Difference]: Finished difference Result 9594 states and 28749 transitions. [2021-06-12 22:24:25,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-12 22:24:25,042 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-12 22:24:25,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:24:25,053 INFO L225 Difference]: With dead ends: 9594 [2021-06-12 22:24:25,054 INFO L226 Difference]: Without dead ends: 9549 [2021-06-12 22:24:25,054 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1128 ImplicationChecksByTransitivity, 2053.9ms TimeCoverageRelationStatistics Valid=308, Invalid=3852, Unknown=0, NotChecked=0, Total=4160 [2021-06-12 22:24:25,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9549 states. [2021-06-12 22:24:25,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9549 to 7244. [2021-06-12 22:24:25,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7244 states, 7243 states have (on average 3.0244373878227253) internal successors, (21906), 7243 states have internal predecessors, (21906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:24:25,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7244 states to 7244 states and 21906 transitions. [2021-06-12 22:24:25,153 INFO L78 Accepts]: Start accepts. Automaton has 7244 states and 21906 transitions. Word has length 48 [2021-06-12 22:24:25,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:24:25,153 INFO L482 AbstractCegarLoop]: Abstraction has 7244 states and 21906 transitions. [2021-06-12 22:24:25,153 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:24:25,153 INFO L276 IsEmpty]: Start isEmpty. Operand 7244 states and 21906 transitions. [2021-06-12 22:24:25,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-12 22:24:25,160 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:24:25,160 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:24:25,360 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,129 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:24:25,360 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:24:25,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:24:25,361 INFO L82 PathProgramCache]: Analyzing trace with hash -1506024556, now seen corresponding path program 43 times [2021-06-12 22:24:25,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:24:25,361 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903377312] [2021-06-12 22:24:25,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:24:25,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:24:25,768 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:24:25,769 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:24:25,769 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903377312] [2021-06-12 22:24:25,769 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [903377312] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:24:25,769 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1931360596] [2021-06-12 22:24:25,769 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:24:25,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:24:25,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-12 22:24:25,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:24:25,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:24:25,925 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:24:25,938 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:24:25,938 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:24:25,938 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-12 22:24:26,137 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-12 22:24:26,137 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:24:26,148 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:24:26,149 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:24:26,149 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:32 [2021-06-12 22:24:26,551 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:24:26,551 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1931360596] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:24:26,551 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:24:26,551 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-12 22:24:26,551 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638627657] [2021-06-12 22:24:26,552 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-12 22:24:26,552 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:24:26,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-12 22:24:26,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1364, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 22:24:26,552 INFO L87 Difference]: Start difference. First operand 7244 states and 21906 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:24:28,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:24:28,513 INFO L93 Difference]: Finished difference Result 8237 states and 24819 transitions. [2021-06-12 22:24:28,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-12 22:24:28,514 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-12 22:24:28,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:24:28,522 INFO L225 Difference]: With dead ends: 8237 [2021-06-12 22:24:28,522 INFO L226 Difference]: Without dead ends: 8184 [2021-06-12 22:24:28,523 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 965 ImplicationChecksByTransitivity, 2085.8ms TimeCoverageRelationStatistics Valid=308, Invalid=3474, Unknown=0, NotChecked=0, Total=3782 [2021-06-12 22:24:28,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8184 states. [2021-06-12 22:24:28,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8184 to 7252. [2021-06-12 22:24:28,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7252 states, 7251 states have (on average 3.023031306026755) internal successors, (21920), 7251 states have internal predecessors, (21920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:24:28,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7252 states to 7252 states and 21920 transitions. [2021-06-12 22:24:28,604 INFO L78 Accepts]: Start accepts. Automaton has 7252 states and 21920 transitions. Word has length 48 [2021-06-12 22:24:28,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:24:28,604 INFO L482 AbstractCegarLoop]: Abstraction has 7252 states and 21920 transitions. [2021-06-12 22:24:28,604 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:24:28,604 INFO L276 IsEmpty]: Start isEmpty. Operand 7252 states and 21920 transitions. [2021-06-12 22:24:28,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-12 22:24:28,611 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:24:28,611 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:24:28,812 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,130 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:24:28,812 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:24:28,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:24:28,812 INFO L82 PathProgramCache]: Analyzing trace with hash 1912760276, now seen corresponding path program 44 times [2021-06-12 22:24:28,812 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:24:28,812 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483450292] [2021-06-12 22:24:28,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:24:28,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:24:29,206 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:24:29,207 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:24:29,207 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483450292] [2021-06-12 22:24:29,207 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483450292] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:24:29,207 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [584997847] [2021-06-12 22:24:29,207 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:24:29,238 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:24:29,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:24:29,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-12 22:24:29,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:24:29,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:24:29,363 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:24:29,376 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:24:29,376 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:24:29,376 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-12 22:24:29,530 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:24:29,531 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:24:29,542 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:24:29,542 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:24:29,542 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-06-12 22:24:29,938 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:24:29,939 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [584997847] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:24:29,939 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:24:29,939 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-12 22:24:29,939 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95424850] [2021-06-12 22:24:29,939 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-12 22:24:29,939 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:24:29,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-12 22:24:29,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1362, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 22:24:29,940 INFO L87 Difference]: Start difference. First operand 7252 states and 21920 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:24:31,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:24:31,658 INFO L93 Difference]: Finished difference Result 9507 states and 28498 transitions. [2021-06-12 22:24:31,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-12 22:24:31,659 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-12 22:24:31,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:24:31,670 INFO L225 Difference]: With dead ends: 9507 [2021-06-12 22:24:31,670 INFO L226 Difference]: Without dead ends: 9464 [2021-06-12 22:24:31,670 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 927 ImplicationChecksByTransitivity, 1776.9ms TimeCoverageRelationStatistics Valid=266, Invalid=3274, Unknown=0, NotChecked=0, Total=3540 [2021-06-12 22:24:31,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9464 states. [2021-06-12 22:24:31,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9464 to 7244. [2021-06-12 22:24:31,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7244 states, 7243 states have (on average 3.024299323484744) internal successors, (21905), 7243 states have internal predecessors, (21905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:24:31,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7244 states to 7244 states and 21905 transitions. [2021-06-12 22:24:31,770 INFO L78 Accepts]: Start accepts. Automaton has 7244 states and 21905 transitions. Word has length 48 [2021-06-12 22:24:31,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:24:31,770 INFO L482 AbstractCegarLoop]: Abstraction has 7244 states and 21905 transitions. [2021-06-12 22:24:31,770 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:24:31,770 INFO L276 IsEmpty]: Start isEmpty. Operand 7244 states and 21905 transitions. [2021-06-12 22:24:31,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-12 22:24:31,777 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:24:31,777 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:24:31,977 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:24:31,978 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:24:31,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:24:31,978 INFO L82 PathProgramCache]: Analyzing trace with hash 632846340, now seen corresponding path program 45 times [2021-06-12 22:24:31,978 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:24:31,978 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955373599] [2021-06-12 22:24:31,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:24:31,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:24:32,390 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:24:32,390 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:24:32,390 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955373599] [2021-06-12 22:24:32,390 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1955373599] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:24:32,390 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1085942779] [2021-06-12 22:24:32,390 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:24:32,422 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 22:24:32,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:24:32,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-12 22:24:32,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:24:32,547 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:24:32,548 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:24:32,560 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:24:32,561 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:24:32,561 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-12 22:24:32,799 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:24:32,800 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:24:32,811 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:24:32,811 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:24:32,812 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-06-12 22:24:33,336 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:24:33,336 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1085942779] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:24:33,336 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:24:33,336 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 24] total 42 [2021-06-12 22:24:33,336 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590385154] [2021-06-12 22:24:33,336 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-06-12 22:24:33,336 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:24:33,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-06-12 22:24:33,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=1666, Unknown=0, NotChecked=0, Total=1806 [2021-06-12 22:24:33,337 INFO L87 Difference]: Start difference. First operand 7244 states and 21905 transitions. Second operand has 43 states, 43 states have (on average 2.046511627906977) internal successors, (88), 42 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:24:35,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:24:35,834 INFO L93 Difference]: Finished difference Result 9738 states and 29379 transitions. [2021-06-12 22:24:35,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-12 22:24:35,834 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.046511627906977) internal successors, (88), 42 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-12 22:24:35,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:24:35,847 INFO L225 Difference]: With dead ends: 9738 [2021-06-12 22:24:35,847 INFO L226 Difference]: Without dead ends: 9685 [2021-06-12 22:24:35,848 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1385 ImplicationChecksByTransitivity, 2525.8ms TimeCoverageRelationStatistics Valid=393, Invalid=4577, Unknown=0, NotChecked=0, Total=4970 [2021-06-12 22:24:35,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9685 states. [2021-06-12 22:24:35,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9685 to 7256. [2021-06-12 22:24:35,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7256 states, 7255 states have (on average 3.022880771881461) internal successors, (21931), 7255 states have internal predecessors, (21931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:24:35,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7256 states to 7256 states and 21931 transitions. [2021-06-12 22:24:35,966 INFO L78 Accepts]: Start accepts. Automaton has 7256 states and 21931 transitions. Word has length 48 [2021-06-12 22:24:35,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:24:35,966 INFO L482 AbstractCegarLoop]: Abstraction has 7256 states and 21931 transitions. [2021-06-12 22:24:35,966 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 2.046511627906977) internal successors, (88), 42 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:24:35,966 INFO L276 IsEmpty]: Start isEmpty. Operand 7256 states and 21931 transitions. [2021-06-12 22:24:35,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-12 22:24:35,973 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:24:35,974 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:24:36,174 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2021-06-12 22:24:36,174 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:24:36,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:24:36,174 INFO L82 PathProgramCache]: Analyzing trace with hash -1898451026, now seen corresponding path program 46 times [2021-06-12 22:24:36,175 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:24:36,175 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629393839] [2021-06-12 22:24:36,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:24:36,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:24:36,571 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:24:36,571 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:24:36,571 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629393839] [2021-06-12 22:24:36,571 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [629393839] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:24:36,571 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1799022596] [2021-06-12 22:24:36,571 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:24:36,602 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:24:36,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:24:36,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-12 22:24:36,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:24:36,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:24:36,731 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:24:36,743 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:24:36,744 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:24:36,744 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-12 22:24:36,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-12 22:24:36,897 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:24:36,908 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:24:36,908 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:24:36,908 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:32 [2021-06-12 22:24:37,305 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:24:37,305 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1799022596] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:24:37,305 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:24:37,305 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-12 22:24:37,306 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186714575] [2021-06-12 22:24:37,306 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-12 22:24:37,306 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:24:37,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-12 22:24:37,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1362, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 22:24:37,306 INFO L87 Difference]: Start difference. First operand 7256 states and 21931 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:24:38,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:24:38,909 INFO L93 Difference]: Finished difference Result 9515 states and 28517 transitions. [2021-06-12 22:24:38,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-12 22:24:38,910 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-12 22:24:38,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:24:38,921 INFO L225 Difference]: With dead ends: 9515 [2021-06-12 22:24:38,921 INFO L226 Difference]: Without dead ends: 9462 [2021-06-12 22:24:38,921 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 927 ImplicationChecksByTransitivity, 1790.7ms TimeCoverageRelationStatistics Valid=266, Invalid=3274, Unknown=0, NotChecked=0, Total=3540 [2021-06-12 22:24:38,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9462 states. [2021-06-12 22:24:39,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9462 to 7242. [2021-06-12 22:24:39,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7242 states, 7241 states have (on average 3.0244441375500624) internal successors, (21900), 7241 states have internal predecessors, (21900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:24:39,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7242 states to 7242 states and 21900 transitions. [2021-06-12 22:24:39,024 INFO L78 Accepts]: Start accepts. Automaton has 7242 states and 21900 transitions. Word has length 48 [2021-06-12 22:24:39,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:24:39,024 INFO L482 AbstractCegarLoop]: Abstraction has 7242 states and 21900 transitions. [2021-06-12 22:24:39,024 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:24:39,024 INFO L276 IsEmpty]: Start isEmpty. Operand 7242 states and 21900 transitions. [2021-06-12 22:24:39,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-12 22:24:39,031 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:24:39,031 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:24:39,231 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2021-06-12 22:24:39,231 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:24:39,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:24:39,231 INFO L82 PathProgramCache]: Analyzing trace with hash 1850818018, now seen corresponding path program 47 times [2021-06-12 22:24:39,232 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:24:39,232 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810603847] [2021-06-12 22:24:39,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:24:39,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:24:39,628 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:24:39,628 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:24:39,628 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810603847] [2021-06-12 22:24:39,628 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810603847] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:24:39,629 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [369263333] [2021-06-12 22:24:39,629 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:24:39,661 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 22:24:39,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:24:39,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-12 22:24:39,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:24:39,784 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:24:39,785 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:24:39,797 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:24:39,798 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:24:39,798 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-12 22:24:39,956 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:24:39,958 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:24:39,970 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:24:39,971 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:24:39,971 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-06-12 22:24:40,376 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:24:40,376 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [369263333] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:24:40,376 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:24:40,377 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-12 22:24:40,377 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169076894] [2021-06-12 22:24:40,377 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-12 22:24:40,377 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:24:40,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-12 22:24:40,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1364, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 22:24:40,377 INFO L87 Difference]: Start difference. First operand 7242 states and 21900 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:24:42,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:24:42,464 INFO L93 Difference]: Finished difference Result 8218 states and 24771 transitions. [2021-06-12 22:24:42,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-12 22:24:42,465 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-12 22:24:42,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:24:42,475 INFO L225 Difference]: With dead ends: 8218 [2021-06-12 22:24:42,475 INFO L226 Difference]: Without dead ends: 8178 [2021-06-12 22:24:42,475 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 965 ImplicationChecksByTransitivity, 2049.8ms TimeCoverageRelationStatistics Valid=308, Invalid=3474, Unknown=0, NotChecked=0, Total=3782 [2021-06-12 22:24:42,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8178 states. [2021-06-12 22:24:42,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8178 to 7246. [2021-06-12 22:24:42,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7246 states, 7245 states have (on average 3.0237405106970323) internal successors, (21907), 7245 states have internal predecessors, (21907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:24:42,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7246 states to 7246 states and 21907 transitions. [2021-06-12 22:24:42,563 INFO L78 Accepts]: Start accepts. Automaton has 7246 states and 21907 transitions. Word has length 48 [2021-06-12 22:24:42,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:24:42,563 INFO L482 AbstractCegarLoop]: Abstraction has 7246 states and 21907 transitions. [2021-06-12 22:24:42,563 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:24:42,563 INFO L276 IsEmpty]: Start isEmpty. Operand 7246 states and 21907 transitions. [2021-06-12 22:24:42,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-12 22:24:42,570 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:24:42,570 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:24:42,772 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2021-06-12 22:24:42,773 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:24:42,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:24:42,773 INFO L82 PathProgramCache]: Analyzing trace with hash 974635554, now seen corresponding path program 48 times [2021-06-12 22:24:42,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:24:42,773 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991131709] [2021-06-12 22:24:42,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:24:42,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:24:43,183 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:24:43,184 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:24:43,184 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991131709] [2021-06-12 22:24:43,184 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1991131709] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:24:43,184 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [520137684] [2021-06-12 22:24:43,184 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:24:43,216 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 22:24:43,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:24:43,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-12 22:24:43,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:24:43,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:24:43,381 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:24:43,394 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:24:43,394 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:24:43,394 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-12 22:24:43,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:24:43,549 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:24:43,560 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:24:43,560 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:24:43,561 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-06-12 22:24:43,959 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:24:43,959 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [520137684] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:24:43,959 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:24:43,959 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-12 22:24:43,959 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136620455] [2021-06-12 22:24:43,959 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-12 22:24:43,959 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:24:43,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-12 22:24:43,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1362, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 22:24:43,960 INFO L87 Difference]: Start difference. First operand 7246 states and 21907 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:24:45,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:24:45,515 INFO L93 Difference]: Finished difference Result 9501 states and 28485 transitions. [2021-06-12 22:24:45,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-12 22:24:45,516 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-12 22:24:45,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:24:45,527 INFO L225 Difference]: With dead ends: 9501 [2021-06-12 22:24:45,527 INFO L226 Difference]: Without dead ends: 9454 [2021-06-12 22:24:45,528 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 927 ImplicationChecksByTransitivity, 1829.5ms TimeCoverageRelationStatistics Valid=266, Invalid=3274, Unknown=0, NotChecked=0, Total=3540 [2021-06-12 22:24:45,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9454 states. [2021-06-12 22:24:45,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9454 to 7234. [2021-06-12 22:24:45,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7234 states, 7233 states have (on average 3.025715470759021) internal successors, (21885), 7233 states have internal predecessors, (21885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:24:45,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7234 states to 7234 states and 21885 transitions. [2021-06-12 22:24:45,648 INFO L78 Accepts]: Start accepts. Automaton has 7234 states and 21885 transitions. Word has length 48 [2021-06-12 22:24:45,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:24:45,648 INFO L482 AbstractCegarLoop]: Abstraction has 7234 states and 21885 transitions. [2021-06-12 22:24:45,648 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:24:45,648 INFO L276 IsEmpty]: Start isEmpty. Operand 7234 states and 21885 transitions. [2021-06-12 22:24:45,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-12 22:24:45,655 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:24:45,655 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:24:45,855 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:24:45,855 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:24:45,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:24:45,856 INFO L82 PathProgramCache]: Analyzing trace with hash -1450822848, now seen corresponding path program 49 times [2021-06-12 22:24:45,856 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:24:45,856 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774093465] [2021-06-12 22:24:45,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:24:45,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:24:46,275 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:24:46,276 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:24:46,276 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774093465] [2021-06-12 22:24:46,276 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774093465] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:24:46,276 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [457237391] [2021-06-12 22:24:46,276 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:24:46,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:24:46,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-12 22:24:46,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:24:46,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:24:46,462 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:24:46,474 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:24:46,475 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:24:46,475 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-12 22:24:46,629 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-12 22:24:46,630 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:24:46,641 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:24:46,642 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:24:46,642 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:32 [2021-06-12 22:24:47,050 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:24:47,051 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [457237391] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:24:47,051 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:24:47,051 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-12 22:24:47,051 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599609228] [2021-06-12 22:24:47,051 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-12 22:24:47,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:24:47,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-12 22:24:47,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1364, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 22:24:47,051 INFO L87 Difference]: Start difference. First operand 7234 states and 21885 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:24:48,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:24:48,973 INFO L93 Difference]: Finished difference Result 8216 states and 24769 transitions. [2021-06-12 22:24:48,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-12 22:24:48,974 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-12 22:24:48,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:24:48,984 INFO L225 Difference]: With dead ends: 8216 [2021-06-12 22:24:48,984 INFO L226 Difference]: Without dead ends: 8176 [2021-06-12 22:24:48,984 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 965 ImplicationChecksByTransitivity, 2113.3ms TimeCoverageRelationStatistics Valid=308, Invalid=3474, Unknown=0, NotChecked=0, Total=3782 [2021-06-12 22:24:48,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8176 states. [2021-06-12 22:24:49,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8176 to 7240. [2021-06-12 22:24:49,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7240 states, 7239 states have (on average 3.025003453515679) internal successors, (21898), 7239 states have internal predecessors, (21898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:24:49,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7240 states to 7240 states and 21898 transitions. [2021-06-12 22:24:49,069 INFO L78 Accepts]: Start accepts. Automaton has 7240 states and 21898 transitions. Word has length 48 [2021-06-12 22:24:49,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:24:49,069 INFO L482 AbstractCegarLoop]: Abstraction has 7240 states and 21898 transitions. [2021-06-12 22:24:49,069 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:24:49,069 INFO L276 IsEmpty]: Start isEmpty. Operand 7240 states and 21898 transitions. [2021-06-12 22:24:49,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-12 22:24:49,076 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:24:49,076 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:24:49,277 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2021-06-12 22:24:49,277 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:24:49,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:24:49,277 INFO L82 PathProgramCache]: Analyzing trace with hash 312847082, now seen corresponding path program 50 times [2021-06-12 22:24:49,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:24:49,277 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225945829] [2021-06-12 22:24:49,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:24:49,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:24:49,677 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:24:49,677 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:24:49,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225945829] [2021-06-12 22:24:49,677 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225945829] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:24:49,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1050817961] [2021-06-12 22:24:49,677 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:24:49,709 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:24:49,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:24:49,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-12 22:24:49,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:24:49,834 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:24:49,835 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:24:49,847 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:24:49,848 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:24:49,848 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-12 22:24:50,001 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-12 22:24:50,003 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:24:50,014 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:24:50,015 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:24:50,015 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:32 [2021-06-12 22:24:50,434 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:24:50,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1050817961] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:24:50,434 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:24:50,434 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-12 22:24:50,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861649540] [2021-06-12 22:24:50,434 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-12 22:24:50,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:24:50,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-12 22:24:50,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1362, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 22:24:50,435 INFO L87 Difference]: Start difference. First operand 7240 states and 21898 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:24:52,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:24:52,151 INFO L93 Difference]: Finished difference Result 9499 states and 28484 transitions. [2021-06-12 22:24:52,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-12 22:24:52,151 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-12 22:24:52,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:24:52,163 INFO L225 Difference]: With dead ends: 9499 [2021-06-12 22:24:52,163 INFO L226 Difference]: Without dead ends: 9411 [2021-06-12 22:24:52,163 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 927 ImplicationChecksByTransitivity, 1804.0ms TimeCoverageRelationStatistics Valid=266, Invalid=3274, Unknown=0, NotChecked=0, Total=3540 [2021-06-12 22:24:52,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9411 states. [2021-06-12 22:24:52,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9411 to 7182. [2021-06-12 22:24:52,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7182 states, 7181 states have (on average 3.0320289653251637) internal successors, (21773), 7181 states have internal predecessors, (21773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:24:52,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7182 states to 7182 states and 21773 transitions. [2021-06-12 22:24:52,262 INFO L78 Accepts]: Start accepts. Automaton has 7182 states and 21773 transitions. Word has length 48 [2021-06-12 22:24:52,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:24:52,262 INFO L482 AbstractCegarLoop]: Abstraction has 7182 states and 21773 transitions. [2021-06-12 22:24:52,262 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:24:52,262 INFO L276 IsEmpty]: Start isEmpty. Operand 7182 states and 21773 transitions. [2021-06-12 22:24:52,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-12 22:24:52,270 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:24:52,270 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:24:52,470 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:24:52,471 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:24:52,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:24:52,471 INFO L82 PathProgramCache]: Analyzing trace with hash -1010561720, now seen corresponding path program 51 times [2021-06-12 22:24:52,471 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:24:52,471 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74189883] [2021-06-12 22:24:52,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:24:52,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:24:52,874 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:24:52,874 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:24:52,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74189883] [2021-06-12 22:24:52,874 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [74189883] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:24:52,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [233640534] [2021-06-12 22:24:52,874 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:24:52,907 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 22:24:52,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:24:52,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-12 22:24:52,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:24:53,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:24:53,041 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:24:53,053 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:24:53,054 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:24:53,054 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-12 22:24:53,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-12 22:24:53,255 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:24:53,265 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:24:53,266 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:24:53,266 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:32 [2021-06-12 22:24:53,683 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:24:53,683 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [233640534] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:24:53,683 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:24:53,683 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-12 22:24:53,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279439896] [2021-06-12 22:24:53,683 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-12 22:24:53,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:24:53,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-12 22:24:53,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1372, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 22:24:53,684 INFO L87 Difference]: Start difference. First operand 7182 states and 21773 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:24:55,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:24:55,643 INFO L93 Difference]: Finished difference Result 8274 states and 25001 transitions. [2021-06-12 22:24:55,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-12 22:24:55,668 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-12 22:24:55,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:24:55,677 INFO L225 Difference]: With dead ends: 8274 [2021-06-12 22:24:55,677 INFO L226 Difference]: Without dead ends: 8234 [2021-06-12 22:24:55,678 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 848 ImplicationChecksByTransitivity, 2065.1ms TimeCoverageRelationStatistics Valid=269, Invalid=3271, Unknown=0, NotChecked=0, Total=3540 [2021-06-12 22:24:55,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8234 states. [2021-06-12 22:24:55,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8234 to 7194. [2021-06-12 22:24:55,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7194 states, 7193 states have (on average 3.0310023634088696) internal successors, (21802), 7193 states have internal predecessors, (21802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:24:55,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7194 states to 7194 states and 21802 transitions. [2021-06-12 22:24:55,757 INFO L78 Accepts]: Start accepts. Automaton has 7194 states and 21802 transitions. Word has length 48 [2021-06-12 22:24:55,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:24:55,757 INFO L482 AbstractCegarLoop]: Abstraction has 7194 states and 21802 transitions. [2021-06-12 22:24:55,757 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:24:55,757 INFO L276 IsEmpty]: Start isEmpty. Operand 7194 states and 21802 transitions. [2021-06-12 22:24:55,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-12 22:24:55,764 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:24:55,764 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:24:55,964 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,138 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:24:55,964 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:24:55,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:24:55,965 INFO L82 PathProgramCache]: Analyzing trace with hash -1886744184, now seen corresponding path program 52 times [2021-06-12 22:24:55,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:24:55,965 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916654736] [2021-06-12 22:24:55,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:24:55,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:24:56,361 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:24:56,361 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:24:56,361 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916654736] [2021-06-12 22:24:56,361 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916654736] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:24:56,361 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [815345481] [2021-06-12 22:24:56,361 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:24:56,396 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:24:56,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:24:56,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-12 22:24:56,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:24:56,523 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:24:56,524 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:24:56,536 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:24:56,537 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:24:56,537 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-12 22:24:56,693 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-12 22:24:56,694 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:24:56,705 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:24:56,705 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:24:56,705 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:32 [2021-06-12 22:24:57,114 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:24:57,114 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [815345481] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:24:57,114 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:24:57,114 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-12 22:24:57,115 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19890103] [2021-06-12 22:24:57,115 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-12 22:24:57,115 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:24:57,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-12 22:24:57,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1370, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 22:24:57,115 INFO L87 Difference]: Start difference. First operand 7194 states and 21802 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:24:58,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:24:58,947 INFO L93 Difference]: Finished difference Result 9371 states and 28151 transitions. [2021-06-12 22:24:58,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-12 22:24:58,948 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-12 22:24:58,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:24:58,959 INFO L225 Difference]: With dead ends: 9371 [2021-06-12 22:24:58,960 INFO L226 Difference]: Without dead ends: 9332 [2021-06-12 22:24:58,960 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 808 ImplicationChecksByTransitivity, 1768.1ms TimeCoverageRelationStatistics Valid=234, Invalid=3072, Unknown=0, NotChecked=0, Total=3306 [2021-06-12 22:24:58,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9332 states. [2021-06-12 22:24:59,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9332 to 7190. [2021-06-12 22:24:59,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7190 states, 7189 states have (on average 3.0311587147030186) internal successors, (21791), 7189 states have internal predecessors, (21791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:24:59,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7190 states to 7190 states and 21791 transitions. [2021-06-12 22:24:59,060 INFO L78 Accepts]: Start accepts. Automaton has 7190 states and 21791 transitions. Word has length 48 [2021-06-12 22:24:59,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:24:59,060 INFO L482 AbstractCegarLoop]: Abstraction has 7190 states and 21791 transitions. [2021-06-12 22:24:59,060 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:24:59,060 INFO L276 IsEmpty]: Start isEmpty. Operand 7190 states and 21791 transitions. [2021-06-12 22:24:59,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-12 22:24:59,068 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:24:59,068 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:24:59,269 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,139 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:24:59,269 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:24:59,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:24:59,269 INFO L82 PathProgramCache]: Analyzing trace with hash -1745029044, now seen corresponding path program 53 times [2021-06-12 22:24:59,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:24:59,269 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122010788] [2021-06-12 22:24:59,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:24:59,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:24:59,679 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:24:59,679 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:24:59,679 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122010788] [2021-06-12 22:24:59,679 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1122010788] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:24:59,679 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [917827596] [2021-06-12 22:24:59,679 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:24:59,714 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 22:24:59,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:24:59,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-12 22:24:59,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:24:59,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:24:59,896 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:24:59,908 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:24:59,909 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:24:59,909 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-12 22:25:00,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:25:00,066 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:25:00,077 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:25:00,077 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:25:00,077 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-06-12 22:25:00,484 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:25:00,484 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [917827596] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:25:00,484 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:25:00,484 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-12 22:25:00,484 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782546223] [2021-06-12 22:25:00,485 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-12 22:25:00,485 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:25:00,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-12 22:25:00,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1370, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 22:25:00,485 INFO L87 Difference]: Start difference. First operand 7190 states and 21791 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:25:02,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:25:02,339 INFO L93 Difference]: Finished difference Result 9481 states and 28384 transitions. [2021-06-12 22:25:02,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-12 22:25:02,340 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-12 22:25:02,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:25:02,353 INFO L225 Difference]: With dead ends: 9481 [2021-06-12 22:25:02,353 INFO L226 Difference]: Without dead ends: 9424 [2021-06-12 22:25:02,354 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 780 ImplicationChecksByTransitivity, 1789.6ms TimeCoverageRelationStatistics Valid=229, Invalid=2963, Unknown=0, NotChecked=0, Total=3192 [2021-06-12 22:25:02,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9424 states. [2021-06-12 22:25:02,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9424 to 7196. [2021-06-12 22:25:02,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7196 states, 7195 states have (on average 3.030437804030577) internal successors, (21804), 7195 states have internal predecessors, (21804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:25:02,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7196 states to 7196 states and 21804 transitions. [2021-06-12 22:25:02,457 INFO L78 Accepts]: Start accepts. Automaton has 7196 states and 21804 transitions. Word has length 48 [2021-06-12 22:25:02,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:25:02,458 INFO L482 AbstractCegarLoop]: Abstraction has 7196 states and 21804 transitions. [2021-06-12 22:25:02,458 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:25:02,458 INFO L276 IsEmpty]: Start isEmpty. Operand 7196 states and 21804 transitions. [2021-06-12 22:25:02,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-12 22:25:02,466 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:25:02,466 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:25:02,667 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,140 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:25:02,667 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:25:02,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:25:02,667 INFO L82 PathProgramCache]: Analyzing trace with hash 1266790792, now seen corresponding path program 54 times [2021-06-12 22:25:02,667 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:25:02,667 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210950165] [2021-06-12 22:25:02,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:25:02,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:25:03,127 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:25:03,127 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:25:03,127 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210950165] [2021-06-12 22:25:03,127 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [210950165] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:25:03,127 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1617202632] [2021-06-12 22:25:03,127 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:25:03,167 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 22:25:03,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:25:03,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-12 22:25:03,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:25:03,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:25:03,357 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:25:03,374 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:25:03,375 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:25:03,375 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-12 22:25:03,567 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:25:03,568 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:25:03,580 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:25:03,581 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:25:03,581 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-06-12 22:25:04,062 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:25:04,062 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1617202632] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:25:04,063 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:25:04,063 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-12 22:25:04,063 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271472461] [2021-06-12 22:25:04,063 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-12 22:25:04,063 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:25:04,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-12 22:25:04,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=1368, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 22:25:04,064 INFO L87 Difference]: Start difference. First operand 7196 states and 21804 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:25:05,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:25:05,965 INFO L93 Difference]: Finished difference Result 9436 states and 28288 transitions. [2021-06-12 22:25:05,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-12 22:25:05,965 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-12 22:25:05,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:25:05,979 INFO L225 Difference]: With dead ends: 9436 [2021-06-12 22:25:05,979 INFO L226 Difference]: Without dead ends: 9342 [2021-06-12 22:25:05,980 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 800 ImplicationChecksByTransitivity, 1892.3ms TimeCoverageRelationStatistics Valid=232, Invalid=2960, Unknown=0, NotChecked=0, Total=3192 [2021-06-12 22:25:05,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9342 states. [2021-06-12 22:25:06,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9342 to 7176. [2021-06-12 22:25:06,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7176 states, 7175 states have (on average 3.032891986062718) internal successors, (21761), 7175 states have internal predecessors, (21761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:25:06,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7176 states to 7176 states and 21761 transitions. [2021-06-12 22:25:06,084 INFO L78 Accepts]: Start accepts. Automaton has 7176 states and 21761 transitions. Word has length 48 [2021-06-12 22:25:06,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:25:06,085 INFO L482 AbstractCegarLoop]: Abstraction has 7176 states and 21761 transitions. [2021-06-12 22:25:06,085 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:25:06,085 INFO L276 IsEmpty]: Start isEmpty. Operand 7176 states and 21761 transitions. [2021-06-12 22:25:06,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-12 22:25:06,092 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:25:06,092 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:25:06,292 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:25:06,293 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:25:06,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:25:06,293 INFO L82 PathProgramCache]: Analyzing trace with hash -1339500818, now seen corresponding path program 55 times [2021-06-12 22:25:06,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:25:06,293 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999444633] [2021-06-12 22:25:06,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:25:06,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:25:06,703 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:25:06,703 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:25:06,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999444633] [2021-06-12 22:25:06,703 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999444633] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:25:06,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2099095408] [2021-06-12 22:25:06,703 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:25:06,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:25:06,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-12 22:25:06,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:25:06,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:25:06,921 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:25:06,939 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:25:06,940 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:25:06,940 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-12 22:25:07,153 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-12 22:25:07,154 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:25:07,165 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:25:07,166 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:25:07,166 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:32 [2021-06-12 22:25:07,598 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:25:07,598 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2099095408] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:25:07,598 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:25:07,598 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-12 22:25:07,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684349602] [2021-06-12 22:25:07,598 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-12 22:25:07,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:25:07,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-12 22:25:07,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1372, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 22:25:07,599 INFO L87 Difference]: Start difference. First operand 7176 states and 21761 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:25:09,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:25:09,589 INFO L93 Difference]: Finished difference Result 8139 states and 24594 transitions. [2021-06-12 22:25:09,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-12 22:25:09,589 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-12 22:25:09,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:25:09,599 INFO L225 Difference]: With dead ends: 8139 [2021-06-12 22:25:09,599 INFO L226 Difference]: Without dead ends: 8099 [2021-06-12 22:25:09,600 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 848 ImplicationChecksByTransitivity, 2147.2ms TimeCoverageRelationStatistics Valid=269, Invalid=3271, Unknown=0, NotChecked=0, Total=3540 [2021-06-12 22:25:09,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8099 states. [2021-06-12 22:25:09,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8099 to 7194. [2021-06-12 22:25:09,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7194 states, 7193 states have (on average 3.031558459613513) internal successors, (21806), 7193 states have internal predecessors, (21806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:25:09,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7194 states to 7194 states and 21806 transitions. [2021-06-12 22:25:09,685 INFO L78 Accepts]: Start accepts. Automaton has 7194 states and 21806 transitions. Word has length 48 [2021-06-12 22:25:09,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:25:09,685 INFO L482 AbstractCegarLoop]: Abstraction has 7194 states and 21806 transitions. [2021-06-12 22:25:09,685 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:25:09,685 INFO L276 IsEmpty]: Start isEmpty. Operand 7194 states and 21806 transitions. [2021-06-12 22:25:09,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-12 22:25:09,694 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:25:09,694 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:25:09,904 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2021-06-12 22:25:09,905 INFO L430 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:25:09,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:25:09,905 INFO L82 PathProgramCache]: Analyzing trace with hash -1568259662, now seen corresponding path program 56 times [2021-06-12 22:25:09,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:25:09,905 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057856167] [2021-06-12 22:25:09,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:25:09,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:25:10,305 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:25:10,305 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:25:10,305 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057856167] [2021-06-12 22:25:10,305 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2057856167] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:25:10,305 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1699702985] [2021-06-12 22:25:10,305 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:25:10,340 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:25:10,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:25:10,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-12 22:25:10,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:25:10,507 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:25:10,508 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:25:10,523 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:25:10,524 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:25:10,524 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-12 22:25:10,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-12 22:25:10,687 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:25:10,698 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:25:10,698 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:25:10,699 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:32 [2021-06-12 22:25:11,148 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:25:11,149 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1699702985] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:25:11,149 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:25:11,149 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-12 22:25:11,149 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331115452] [2021-06-12 22:25:11,149 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-12 22:25:11,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:25:11,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-12 22:25:11,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1370, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 22:25:11,149 INFO L87 Difference]: Start difference. First operand 7194 states and 21806 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:25:12,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:25:12,768 INFO L93 Difference]: Finished difference Result 9375 states and 28163 transitions. [2021-06-12 22:25:12,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-12 22:25:12,768 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-12 22:25:12,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:25:12,780 INFO L225 Difference]: With dead ends: 9375 [2021-06-12 22:25:12,780 INFO L226 Difference]: Without dead ends: 9330 [2021-06-12 22:25:12,781 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 808 ImplicationChecksByTransitivity, 1874.6ms TimeCoverageRelationStatistics Valid=234, Invalid=3072, Unknown=0, NotChecked=0, Total=3306 [2021-06-12 22:25:12,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9330 states. [2021-06-12 22:25:12,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9330 to 7188. [2021-06-12 22:25:12,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7188 states, 7187 states have (on average 3.031445665785446) internal successors, (21787), 7187 states have internal predecessors, (21787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:25:12,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7188 states to 7188 states and 21787 transitions. [2021-06-12 22:25:12,881 INFO L78 Accepts]: Start accepts. Automaton has 7188 states and 21787 transitions. Word has length 48 [2021-06-12 22:25:12,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:25:12,882 INFO L482 AbstractCegarLoop]: Abstraction has 7188 states and 21787 transitions. [2021-06-12 22:25:12,882 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:25:12,882 INFO L276 IsEmpty]: Start isEmpty. Operand 7188 states and 21787 transitions. [2021-06-12 22:25:12,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-12 22:25:12,889 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:25:12,889 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:25:13,090 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2021-06-12 22:25:13,090 INFO L430 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:25:13,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:25:13,090 INFO L82 PathProgramCache]: Analyzing trace with hash 1779975834, now seen corresponding path program 57 times [2021-06-12 22:25:13,090 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:25:13,090 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855483899] [2021-06-12 22:25:13,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:25:13,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:25:13,504 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:25:13,505 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:25:13,505 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855483899] [2021-06-12 22:25:13,505 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1855483899] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:25:13,505 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1966392572] [2021-06-12 22:25:13,505 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:25:13,585 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 22:25:13,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:25:13,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-12 22:25:13,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:25:13,712 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-12 22:25:13,713 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:25:13,725 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:25:13,725 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:25:13,726 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:31 [2021-06-12 22:25:13,886 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:25:13,887 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:25:13,898 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:25:13,898 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:25:13,898 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-06-12 22:25:14,302 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:25:14,302 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1966392572] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:25:14,302 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:25:14,302 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-12 22:25:14,302 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785356834] [2021-06-12 22:25:14,302 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-12 22:25:14,302 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:25:14,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-12 22:25:14,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1370, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 22:25:14,303 INFO L87 Difference]: Start difference. First operand 7188 states and 21787 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:25:16,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:25:16,388 INFO L93 Difference]: Finished difference Result 9479 states and 28383 transitions. [2021-06-12 22:25:16,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-12 22:25:16,388 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-12 22:25:16,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:25:16,399 INFO L225 Difference]: With dead ends: 9479 [2021-06-12 22:25:16,399 INFO L226 Difference]: Without dead ends: 9420 [2021-06-12 22:25:16,400 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 780 ImplicationChecksByTransitivity, 1745.0ms TimeCoverageRelationStatistics Valid=229, Invalid=2963, Unknown=0, NotChecked=0, Total=3192 [2021-06-12 22:25:16,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9420 states. [2021-06-12 22:25:16,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9420 to 7194. [2021-06-12 22:25:16,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7194 states, 7193 states have (on average 3.030724315306548) internal successors, (21800), 7193 states have internal predecessors, (21800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:25:16,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7194 states to 7194 states and 21800 transitions. [2021-06-12 22:25:16,511 INFO L78 Accepts]: Start accepts. Automaton has 7194 states and 21800 transitions. Word has length 48 [2021-06-12 22:25:16,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:25:16,511 INFO L482 AbstractCegarLoop]: Abstraction has 7194 states and 21800 transitions. [2021-06-12 22:25:16,511 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:25:16,511 INFO L276 IsEmpty]: Start isEmpty. Operand 7194 states and 21800 transitions. [2021-06-12 22:25:16,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-12 22:25:16,519 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:25:16,519 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:25:16,724 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2021-06-12 22:25:16,725 INFO L430 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:25:16,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:25:16,725 INFO L82 PathProgramCache]: Analyzing trace with hash 1625538316, now seen corresponding path program 58 times [2021-06-12 22:25:16,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:25:16,725 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256439098] [2021-06-12 22:25:16,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:25:16,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:25:17,201 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:25:17,201 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:25:17,201 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256439098] [2021-06-12 22:25:17,201 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [256439098] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:25:17,201 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1347027236] [2021-06-12 22:25:17,201 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:25:17,244 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:25:17,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:25:17,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-12 22:25:17,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:25:17,409 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:25:17,410 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:25:17,426 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:25:17,427 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:25:17,427 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-12 22:25:17,629 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-12 22:25:17,630 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:25:17,645 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:25:17,646 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:25:17,646 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:32 [2021-06-12 22:25:18,119 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:25:18,119 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1347027236] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:25:18,119 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:25:18,119 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-12 22:25:18,119 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120712060] [2021-06-12 22:25:18,120 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-12 22:25:18,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:25:18,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-12 22:25:18,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=1368, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 22:25:18,120 INFO L87 Difference]: Start difference. First operand 7194 states and 21800 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:25:19,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:25:19,874 INFO L93 Difference]: Finished difference Result 9426 states and 28270 transitions. [2021-06-12 22:25:19,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-12 22:25:19,874 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-12 22:25:19,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:25:19,886 INFO L225 Difference]: With dead ends: 9426 [2021-06-12 22:25:19,887 INFO L226 Difference]: Without dead ends: 9270 [2021-06-12 22:25:19,887 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 800 ImplicationChecksByTransitivity, 1935.5ms TimeCoverageRelationStatistics Valid=232, Invalid=2960, Unknown=0, NotChecked=0, Total=3192 [2021-06-12 22:25:19,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9270 states. [2021-06-12 22:25:19,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9270 to 7128. [2021-06-12 22:25:19,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7128 states, 7127 states have (on average 3.0350778728777885) internal successors, (21631), 7127 states have internal predecessors, (21631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:25:19,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7128 states to 7128 states and 21631 transitions. [2021-06-12 22:25:19,993 INFO L78 Accepts]: Start accepts. Automaton has 7128 states and 21631 transitions. Word has length 48 [2021-06-12 22:25:19,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:25:19,993 INFO L482 AbstractCegarLoop]: Abstraction has 7128 states and 21631 transitions. [2021-06-12 22:25:19,994 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:25:19,994 INFO L276 IsEmpty]: Start isEmpty. Operand 7128 states and 21631 transitions. [2021-06-12 22:25:20,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-12 22:25:20,001 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:25:20,002 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:25:20,202 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2021-06-12 22:25:20,202 INFO L430 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:25:20,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:25:20,203 INFO L82 PathProgramCache]: Analyzing trace with hash 102150946, now seen corresponding path program 59 times [2021-06-12 22:25:20,203 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:25:20,203 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779566448] [2021-06-12 22:25:20,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:25:20,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:25:20,670 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:25:20,670 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:25:20,670 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779566448] [2021-06-12 22:25:20,670 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [779566448] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:25:20,670 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2122119598] [2021-06-12 22:25:20,670 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:25:20,703 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 22:25:20,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:25:20,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 44 conjunts are in the unsatisfiable core [2021-06-12 22:25:20,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:25:20,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:25:20,831 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:25:20,844 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:25:20,844 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:25:20,844 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-12 22:25:21,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:25:21,004 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:25:21,016 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:25:21,016 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:25:21,016 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-06-12 22:25:21,496 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:25:21,496 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2122119598] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:25:21,496 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:25:21,496 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-12 22:25:21,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313345309] [2021-06-12 22:25:21,497 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-12 22:25:21,497 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:25:21,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-12 22:25:21,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1372, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 22:25:21,497 INFO L87 Difference]: Start difference. First operand 7128 states and 21631 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:25:23,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:25:23,547 INFO L93 Difference]: Finished difference Result 8081 states and 24441 transitions. [2021-06-12 22:25:23,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-12 22:25:23,548 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-12 22:25:23,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:25:23,558 INFO L225 Difference]: With dead ends: 8081 [2021-06-12 22:25:23,558 INFO L226 Difference]: Without dead ends: 8041 [2021-06-12 22:25:23,558 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 797 ImplicationChecksByTransitivity, 2160.5ms TimeCoverageRelationStatistics Valid=279, Invalid=3143, Unknown=0, NotChecked=0, Total=3422 [2021-06-12 22:25:23,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8041 states. [2021-06-12 22:25:23,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8041 to 7136. [2021-06-12 22:25:23,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7136 states, 7135 states have (on average 3.0343377715487034) internal successors, (21650), 7135 states have internal predecessors, (21650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:25:23,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7136 states to 7136 states and 21650 transitions. [2021-06-12 22:25:23,641 INFO L78 Accepts]: Start accepts. Automaton has 7136 states and 21650 transitions. Word has length 48 [2021-06-12 22:25:23,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:25:23,641 INFO L482 AbstractCegarLoop]: Abstraction has 7136 states and 21650 transitions. [2021-06-12 22:25:23,641 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:25:23,641 INFO L276 IsEmpty]: Start isEmpty. Operand 7136 states and 21650 transitions. [2021-06-12 22:25:23,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-12 22:25:23,648 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:25:23,648 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:25:23,848 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:25:23,849 INFO L430 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:25:23,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:25:23,849 INFO L82 PathProgramCache]: Analyzing trace with hash -774031518, now seen corresponding path program 60 times [2021-06-12 22:25:23,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:25:23,849 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694258662] [2021-06-12 22:25:23,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:25:23,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:25:24,401 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:25:24,401 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:25:24,401 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694258662] [2021-06-12 22:25:24,401 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [694258662] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:25:24,401 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438194525] [2021-06-12 22:25:24,401 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:25:24,437 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 22:25:24,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:25:24,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-12 22:25:24,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:25:24,565 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:25:24,566 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:25:24,578 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:25:24,579 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:25:24,579 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-12 22:25:24,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:25:24,737 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:25:24,749 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:25:24,749 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:25:24,749 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-06-12 22:25:25,171 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:25:25,171 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1438194525] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:25:25,172 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:25:25,172 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-12 22:25:25,172 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839050977] [2021-06-12 22:25:25,172 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-12 22:25:25,172 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:25:25,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-12 22:25:25,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1372, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 22:25:25,172 INFO L87 Difference]: Start difference. First operand 7136 states and 21650 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:25:26,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:25:26,891 INFO L93 Difference]: Finished difference Result 8047 states and 24372 transitions. [2021-06-12 22:25:26,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-12 22:25:26,892 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-12 22:25:26,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:25:26,901 INFO L225 Difference]: With dead ends: 8047 [2021-06-12 22:25:26,902 INFO L226 Difference]: Without dead ends: 8008 [2021-06-12 22:25:26,902 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 778 ImplicationChecksByTransitivity, 2103.5ms TimeCoverageRelationStatistics Valid=256, Invalid=3050, Unknown=0, NotChecked=0, Total=3306 [2021-06-12 22:25:26,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8008 states. [2021-06-12 22:25:26,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8008 to 7132. [2021-06-12 22:25:26,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7132 states, 7131 states have (on average 3.0349179638199413) internal successors, (21642), 7131 states have internal predecessors, (21642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:25:26,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7132 states to 7132 states and 21642 transitions. [2021-06-12 22:25:26,986 INFO L78 Accepts]: Start accepts. Automaton has 7132 states and 21642 transitions. Word has length 48 [2021-06-12 22:25:26,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:25:26,986 INFO L482 AbstractCegarLoop]: Abstraction has 7132 states and 21642 transitions. [2021-06-12 22:25:26,986 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:25:26,986 INFO L276 IsEmpty]: Start isEmpty. Operand 7132 states and 21642 transitions. [2021-06-12 22:25:26,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-12 22:25:26,993 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:25:26,993 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:25:27,194 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable149 [2021-06-12 22:25:27,194 INFO L430 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:25:27,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:25:27,194 INFO L82 PathProgramCache]: Analyzing trace with hash 470015842, now seen corresponding path program 61 times [2021-06-12 22:25:27,194 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:25:27,195 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719570874] [2021-06-12 22:25:27,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:25:27,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:25:27,607 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:25:27,607 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:25:27,607 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719570874] [2021-06-12 22:25:27,607 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1719570874] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:25:27,607 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [99307304] [2021-06-12 22:25:27,607 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:25:27,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:25:27,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-12 22:25:27,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:25:27,768 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:25:27,769 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:25:27,781 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:25:27,782 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:25:27,782 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-12 22:25:27,938 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-12 22:25:27,939 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:25:27,950 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:25:27,951 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:25:27,951 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:32 [2021-06-12 22:25:28,392 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:25:28,392 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [99307304] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:25:28,393 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:25:28,393 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-12 22:25:28,393 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957635896] [2021-06-12 22:25:28,393 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-12 22:25:28,393 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:25:28,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-12 22:25:28,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1372, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 22:25:28,393 INFO L87 Difference]: Start difference. First operand 7132 states and 21642 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:25:30,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:25:30,422 INFO L93 Difference]: Finished difference Result 8087 states and 24453 transitions. [2021-06-12 22:25:30,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-12 22:25:30,423 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-12 22:25:30,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:25:30,433 INFO L225 Difference]: With dead ends: 8087 [2021-06-12 22:25:30,433 INFO L226 Difference]: Without dead ends: 8047 [2021-06-12 22:25:30,433 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 797 ImplicationChecksByTransitivity, 2100.6ms TimeCoverageRelationStatistics Valid=279, Invalid=3143, Unknown=0, NotChecked=0, Total=3422 [2021-06-12 22:25:30,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8047 states. [2021-06-12 22:25:30,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8047 to 7138. [2021-06-12 22:25:30,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7138 states, 7137 states have (on average 3.034188034188034) internal successors, (21655), 7137 states have internal predecessors, (21655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:25:30,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7138 states to 7138 states and 21655 transitions. [2021-06-12 22:25:30,520 INFO L78 Accepts]: Start accepts. Automaton has 7138 states and 21655 transitions. Word has length 48 [2021-06-12 22:25:30,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:25:30,520 INFO L482 AbstractCegarLoop]: Abstraction has 7138 states and 21655 transitions. [2021-06-12 22:25:30,520 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:25:30,520 INFO L276 IsEmpty]: Start isEmpty. Operand 7138 states and 21655 transitions. [2021-06-12 22:25:30,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-12 22:25:30,527 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:25:30,527 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:25:30,728 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:25:30,728 INFO L430 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:25:30,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:25:30,728 INFO L82 PathProgramCache]: Analyzing trace with hash -2061281524, now seen corresponding path program 62 times [2021-06-12 22:25:30,728 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:25:30,728 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689076333] [2021-06-12 22:25:30,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:25:30,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:25:31,168 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:25:31,168 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:25:31,168 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689076333] [2021-06-12 22:25:31,168 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [689076333] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:25:31,168 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [679342910] [2021-06-12 22:25:31,168 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:25:31,201 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:25:31,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:25:31,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-12 22:25:31,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:25:31,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:25:31,338 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:25:31,352 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:25:31,353 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:25:31,353 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-12 22:25:31,523 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-12 22:25:31,524 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:25:31,535 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:25:31,536 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:25:31,536 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:32 [2021-06-12 22:25:31,991 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:25:31,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [679342910] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:25:31,991 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:25:31,991 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-12 22:25:31,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158233849] [2021-06-12 22:25:31,991 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-12 22:25:31,991 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:25:31,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-12 22:25:31,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1372, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 22:25:31,992 INFO L87 Difference]: Start difference. First operand 7138 states and 21655 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:25:33,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:25:33,891 INFO L93 Difference]: Finished difference Result 8057 states and 24393 transitions. [2021-06-12 22:25:33,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-12 22:25:33,891 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-12 22:25:33,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:25:33,901 INFO L225 Difference]: With dead ends: 8057 [2021-06-12 22:25:33,901 INFO L226 Difference]: Without dead ends: 8012 [2021-06-12 22:25:33,902 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 778 ImplicationChecksByTransitivity, 1992.8ms TimeCoverageRelationStatistics Valid=256, Invalid=3050, Unknown=0, NotChecked=0, Total=3306 [2021-06-12 22:25:33,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8012 states. [2021-06-12 22:25:34,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8012 to 7132. [2021-06-12 22:25:34,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7132 states, 7131 states have (on average 3.0346374982470903) internal successors, (21640), 7131 states have internal predecessors, (21640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:25:34,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7132 states to 7132 states and 21640 transitions. [2021-06-12 22:25:34,019 INFO L78 Accepts]: Start accepts. Automaton has 7132 states and 21640 transitions. Word has length 48 [2021-06-12 22:25:34,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:25:34,019 INFO L482 AbstractCegarLoop]: Abstraction has 7132 states and 21640 transitions. [2021-06-12 22:25:34,019 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:25:34,019 INFO L276 IsEmpty]: Start isEmpty. Operand 7132 states and 21640 transitions. [2021-06-12 22:25:34,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-12 22:25:34,026 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:25:34,026 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:25:34,227 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,149 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:25:34,227 INFO L430 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:25:34,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:25:34,227 INFO L82 PathProgramCache]: Analyzing trace with hash -2000985182, now seen corresponding path program 63 times [2021-06-12 22:25:34,227 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:25:34,227 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915195530] [2021-06-12 22:25:34,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:25:34,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:25:34,640 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:25:34,640 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:25:34,640 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915195530] [2021-06-12 22:25:34,640 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1915195530] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:25:34,640 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [671173785] [2021-06-12 22:25:34,640 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:25:34,673 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 22:25:34,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:25:34,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-12 22:25:34,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:25:34,833 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:25:34,834 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:25:34,846 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:25:34,847 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:25:34,847 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-12 22:25:35,080 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:25:35,081 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:25:35,095 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:25:35,096 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:25:35,096 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-06-12 22:25:35,519 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:25:35,519 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [671173785] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:25:35,519 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:25:35,519 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-12 22:25:35,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996530633] [2021-06-12 22:25:35,519 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-12 22:25:35,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:25:35,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-12 22:25:35,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1370, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 22:25:35,520 INFO L87 Difference]: Start difference. First operand 7132 states and 21640 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:25:37,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:25:37,084 INFO L93 Difference]: Finished difference Result 9313 states and 27999 transitions. [2021-06-12 22:25:37,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-12 22:25:37,084 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-12 22:25:37,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:25:37,096 INFO L225 Difference]: With dead ends: 9313 [2021-06-12 22:25:37,096 INFO L226 Difference]: Without dead ends: 9278 [2021-06-12 22:25:37,096 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 775 ImplicationChecksByTransitivity, 1839.5ms TimeCoverageRelationStatistics Valid=229, Invalid=2963, Unknown=0, NotChecked=0, Total=3192 [2021-06-12 22:25:37,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9278 states. [2021-06-12 22:25:37,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9278 to 7136. [2021-06-12 22:25:37,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7136 states, 7135 states have (on average 3.0340574632095305) internal successors, (21648), 7135 states have internal predecessors, (21648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:25:37,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7136 states to 7136 states and 21648 transitions. [2021-06-12 22:25:37,201 INFO L78 Accepts]: Start accepts. Automaton has 7136 states and 21648 transitions. Word has length 48 [2021-06-12 22:25:37,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:25:37,201 INFO L482 AbstractCegarLoop]: Abstraction has 7136 states and 21648 transitions. [2021-06-12 22:25:37,201 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:25:37,201 INFO L276 IsEmpty]: Start isEmpty. Operand 7136 states and 21648 transitions. [2021-06-12 22:25:37,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-12 22:25:37,208 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:25:37,209 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:25:37,409 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,150 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:25:37,409 INFO L430 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:25:37,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:25:37,409 INFO L82 PathProgramCache]: Analyzing trace with hash 1686544354, now seen corresponding path program 64 times [2021-06-12 22:25:37,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:25:37,409 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094166602] [2021-06-12 22:25:37,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:25:37,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:25:37,808 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:25:37,808 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:25:37,808 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094166602] [2021-06-12 22:25:37,808 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094166602] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:25:37,808 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2051345233] [2021-06-12 22:25:37,808 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:25:37,841 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:25:37,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:25:37,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-12 22:25:37,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:25:37,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:25:37,970 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:25:37,982 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:25:37,983 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:25:37,983 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-12 22:25:38,142 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-12 22:25:38,143 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:25:38,154 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:25:38,155 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:25:38,155 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:32 [2021-06-12 22:25:38,565 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:25:38,565 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2051345233] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:25:38,565 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:25:38,565 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-12 22:25:38,565 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061458654] [2021-06-12 22:25:38,565 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-12 22:25:38,565 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:25:38,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-12 22:25:38,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1370, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 22:25:38,566 INFO L87 Difference]: Start difference. First operand 7136 states and 21648 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:25:40,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:25:40,263 INFO L93 Difference]: Finished difference Result 9317 states and 28005 transitions. [2021-06-12 22:25:40,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-12 22:25:40,264 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-12 22:25:40,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:25:40,275 INFO L225 Difference]: With dead ends: 9317 [2021-06-12 22:25:40,275 INFO L226 Difference]: Without dead ends: 9272 [2021-06-12 22:25:40,276 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 775 ImplicationChecksByTransitivity, 1785.9ms TimeCoverageRelationStatistics Valid=229, Invalid=2963, Unknown=0, NotChecked=0, Total=3192 [2021-06-12 22:25:40,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9272 states. [2021-06-12 22:25:40,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9272 to 7130. [2021-06-12 22:25:40,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7130 states, 7129 states have (on average 3.034787487726189) internal successors, (21635), 7129 states have internal predecessors, (21635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:25:40,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7130 states to 7130 states and 21635 transitions. [2021-06-12 22:25:40,373 INFO L78 Accepts]: Start accepts. Automaton has 7130 states and 21635 transitions. Word has length 48 [2021-06-12 22:25:40,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:25:40,373 INFO L482 AbstractCegarLoop]: Abstraction has 7130 states and 21635 transitions. [2021-06-12 22:25:40,373 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:25:40,373 INFO L276 IsEmpty]: Start isEmpty. Operand 7130 states and 21635 transitions. [2021-06-12 22:25:40,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-12 22:25:40,380 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:25:40,380 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:25:40,580 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,151 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:25:40,580 INFO L430 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:25:40,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:25:40,580 INFO L82 PathProgramCache]: Analyzing trace with hash -2071260170, now seen corresponding path program 65 times [2021-06-12 22:25:40,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:25:40,581 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72406117] [2021-06-12 22:25:40,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:25:40,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:25:41,007 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:25:41,007 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:25:41,007 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72406117] [2021-06-12 22:25:41,007 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [72406117] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:25:41,007 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [254390972] [2021-06-12 22:25:41,007 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:25:41,046 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 22:25:41,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:25:41,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 44 conjunts are in the unsatisfiable core [2021-06-12 22:25:41,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:25:41,178 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:25:41,179 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:25:41,191 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:25:41,192 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:25:41,192 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-12 22:25:41,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:25:41,351 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:25:41,362 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:25:41,363 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:25:41,363 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-06-12 22:25:41,831 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:25:41,831 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [254390972] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:25:41,831 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:25:41,831 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-12 22:25:41,831 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182446546] [2021-06-12 22:25:41,831 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-12 22:25:41,831 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:25:41,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-12 22:25:41,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1372, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 22:25:41,832 INFO L87 Difference]: Start difference. First operand 7130 states and 21635 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:25:43,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:25:43,743 INFO L93 Difference]: Finished difference Result 8092 states and 24465 transitions. [2021-06-12 22:25:43,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-12 22:25:43,743 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-12 22:25:43,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:25:43,753 INFO L225 Difference]: With dead ends: 8092 [2021-06-12 22:25:43,753 INFO L226 Difference]: Without dead ends: 8039 [2021-06-12 22:25:43,754 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 847 ImplicationChecksByTransitivity, 2063.2ms TimeCoverageRelationStatistics Valid=274, Invalid=3266, Unknown=0, NotChecked=0, Total=3540 [2021-06-12 22:25:43,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8039 states. [2021-06-12 22:25:43,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8039 to 7138. [2021-06-12 22:25:43,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7138 states, 7137 states have (on average 3.033347344822755) internal successors, (21649), 7137 states have internal predecessors, (21649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:25:43,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7138 states to 7138 states and 21649 transitions. [2021-06-12 22:25:43,837 INFO L78 Accepts]: Start accepts. Automaton has 7138 states and 21649 transitions. Word has length 48 [2021-06-12 22:25:43,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:25:43,837 INFO L482 AbstractCegarLoop]: Abstraction has 7138 states and 21649 transitions. [2021-06-12 22:25:43,837 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:25:43,837 INFO L276 IsEmpty]: Start isEmpty. Operand 7138 states and 21649 transitions. [2021-06-12 22:25:43,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-12 22:25:43,844 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:25:43,844 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:25:44,045 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,152 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:25:44,045 INFO L430 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:25:44,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:25:44,046 INFO L82 PathProgramCache]: Analyzing trace with hash 1347524662, now seen corresponding path program 66 times [2021-06-12 22:25:44,046 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:25:44,046 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935388855] [2021-06-12 22:25:44,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:25:44,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:25:44,483 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:25:44,484 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:25:44,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935388855] [2021-06-12 22:25:44,484 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1935388855] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:25:44,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1090211065] [2021-06-12 22:25:44,484 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:25:44,517 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 22:25:44,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:25:44,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-12 22:25:44,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:25:44,650 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:25:44,650 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:25:44,663 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:25:44,663 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:25:44,663 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-12 22:25:44,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:25:44,824 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:25:44,835 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:25:44,835 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:25:44,835 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-06-12 22:25:45,250 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:25:45,250 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1090211065] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:25:45,250 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:25:45,250 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-12 22:25:45,250 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635901605] [2021-06-12 22:25:45,250 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-12 22:25:45,250 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:25:45,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-12 22:25:45,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1370, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 22:25:45,251 INFO L87 Difference]: Start difference. First operand 7138 states and 21649 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:25:46,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:25:46,935 INFO L93 Difference]: Finished difference Result 9315 states and 27998 transitions. [2021-06-12 22:25:46,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-12 22:25:46,936 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-12 22:25:46,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:25:46,947 INFO L225 Difference]: With dead ends: 9315 [2021-06-12 22:25:46,947 INFO L226 Difference]: Without dead ends: 9272 [2021-06-12 22:25:46,947 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 810 ImplicationChecksByTransitivity, 1796.7ms TimeCoverageRelationStatistics Valid=235, Invalid=3071, Unknown=0, NotChecked=0, Total=3306 [2021-06-12 22:25:46,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9272 states. [2021-06-12 22:25:47,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9272 to 7130. [2021-06-12 22:25:47,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7130 states, 7129 states have (on average 3.0346472155982607) internal successors, (21634), 7129 states have internal predecessors, (21634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:25:47,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7130 states to 7130 states and 21634 transitions. [2021-06-12 22:25:47,044 INFO L78 Accepts]: Start accepts. Automaton has 7130 states and 21634 transitions. Word has length 48 [2021-06-12 22:25:47,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:25:47,044 INFO L482 AbstractCegarLoop]: Abstraction has 7130 states and 21634 transitions. [2021-06-12 22:25:47,044 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:25:47,044 INFO L276 IsEmpty]: Start isEmpty. Operand 7130 states and 21634 transitions. [2021-06-12 22:25:47,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-12 22:25:47,051 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:25:47,051 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:25:47,252 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 153 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable155 [2021-06-12 22:25:47,252 INFO L430 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:25:47,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:25:47,252 INFO L82 PathProgramCache]: Analyzing trace with hash 67610726, now seen corresponding path program 67 times [2021-06-12 22:25:47,252 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:25:47,252 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973851539] [2021-06-12 22:25:47,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:25:47,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:25:47,674 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:25:47,674 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:25:47,674 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973851539] [2021-06-12 22:25:47,675 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973851539] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:25:47,675 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1838658821] [2021-06-12 22:25:47,675 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:25:47,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:25:47,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-12 22:25:47,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:25:47,834 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:25:47,835 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:25:47,847 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:25:47,848 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:25:47,848 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-12 22:25:48,006 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-12 22:25:48,007 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:25:48,018 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:25:48,018 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:25:48,018 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:32 [2021-06-12 22:25:48,444 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:25:48,445 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1838658821] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:25:48,445 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:25:48,445 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-12 22:25:48,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179383656] [2021-06-12 22:25:48,445 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-12 22:25:48,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:25:48,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-12 22:25:48,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1372, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 22:25:48,445 INFO L87 Difference]: Start difference. First operand 7130 states and 21634 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:25:50,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:25:50,536 INFO L93 Difference]: Finished difference Result 8100 states and 24482 transitions. [2021-06-12 22:25:50,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-12 22:25:50,536 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-12 22:25:50,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:25:50,546 INFO L225 Difference]: With dead ends: 8100 [2021-06-12 22:25:50,546 INFO L226 Difference]: Without dead ends: 8047 [2021-06-12 22:25:50,546 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 847 ImplicationChecksByTransitivity, 2061.6ms TimeCoverageRelationStatistics Valid=274, Invalid=3266, Unknown=0, NotChecked=0, Total=3540 [2021-06-12 22:25:50,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8047 states. [2021-06-12 22:25:50,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8047 to 7142. [2021-06-12 22:25:50,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7142 states, 7141 states have (on average 3.0331886290435515) internal successors, (21660), 7141 states have internal predecessors, (21660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:25:50,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7142 states to 7142 states and 21660 transitions. [2021-06-12 22:25:50,632 INFO L78 Accepts]: Start accepts. Automaton has 7142 states and 21660 transitions. Word has length 48 [2021-06-12 22:25:50,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:25:50,632 INFO L482 AbstractCegarLoop]: Abstraction has 7142 states and 21660 transitions. [2021-06-12 22:25:50,632 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:25:50,632 INFO L276 IsEmpty]: Start isEmpty. Operand 7142 states and 21660 transitions. [2021-06-12 22:25:50,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-12 22:25:50,639 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:25:50,639 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:25:50,839 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:25:50,839 INFO L430 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:25:50,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:25:50,840 INFO L82 PathProgramCache]: Analyzing trace with hash 1831280656, now seen corresponding path program 68 times [2021-06-12 22:25:50,840 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:25:50,840 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514635741] [2021-06-12 22:25:50,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:25:50,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:25:51,243 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:25:51,243 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:25:51,243 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514635741] [2021-06-12 22:25:51,243 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [514635741] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:25:51,243 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1436071777] [2021-06-12 22:25:51,243 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:25:51,276 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:25:51,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:25:51,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-12 22:25:51,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:25:51,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:25:51,406 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:25:51,418 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:25:51,419 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:25:51,419 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-12 22:25:51,574 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-12 22:25:51,575 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:25:51,622 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:25:51,623 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:25:51,623 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:32 [2021-06-12 22:25:52,033 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:25:52,033 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1436071777] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:25:52,033 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:25:52,034 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-12 22:25:52,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293216190] [2021-06-12 22:25:52,034 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-12 22:25:52,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:25:52,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-12 22:25:52,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1370, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 22:25:52,034 INFO L87 Difference]: Start difference. First operand 7142 states and 21660 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:25:53,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:25:53,730 INFO L93 Difference]: Finished difference Result 9323 states and 28017 transitions. [2021-06-12 22:25:53,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-12 22:25:53,730 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-12 22:25:53,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:25:53,741 INFO L225 Difference]: With dead ends: 9323 [2021-06-12 22:25:53,741 INFO L226 Difference]: Without dead ends: 9270 [2021-06-12 22:25:53,741 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 810 ImplicationChecksByTransitivity, 1764.3ms TimeCoverageRelationStatistics Valid=235, Invalid=3071, Unknown=0, NotChecked=0, Total=3306 [2021-06-12 22:25:53,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9270 states. [2021-06-12 22:25:53,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9270 to 7128. [2021-06-12 22:25:53,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7128 states, 7127 states have (on average 3.0347972498947664) internal successors, (21629), 7127 states have internal predecessors, (21629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:25:53,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7128 states to 7128 states and 21629 transitions. [2021-06-12 22:25:53,830 INFO L78 Accepts]: Start accepts. Automaton has 7128 states and 21629 transitions. Word has length 48 [2021-06-12 22:25:53,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:25:53,830 INFO L482 AbstractCegarLoop]: Abstraction has 7128 states and 21629 transitions. [2021-06-12 22:25:53,830 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:25:53,830 INFO L276 IsEmpty]: Start isEmpty. Operand 7128 states and 21629 transitions. [2021-06-12 22:25:53,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-12 22:25:53,836 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:25:53,837 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:25:54,037 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2021-06-12 22:25:54,037 INFO L430 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:25:54,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:25:54,037 INFO L82 PathProgramCache]: Analyzing trace with hash 1285582404, now seen corresponding path program 69 times [2021-06-12 22:25:54,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:25:54,037 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308693051] [2021-06-12 22:25:54,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:25:54,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:25:54,554 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:25:54,554 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:25:54,554 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308693051] [2021-06-12 22:25:54,554 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1308693051] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:25:54,554 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1051603461] [2021-06-12 22:25:54,554 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:25:54,588 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 22:25:54,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:25:54,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-12 22:25:54,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:25:54,731 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-12 22:25:54,732 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:25:54,744 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:25:54,745 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:25:54,745 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:31 [2021-06-12 22:25:54,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:25:54,905 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:25:54,916 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:25:54,917 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:25:54,917 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-06-12 22:25:55,337 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:25:55,337 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1051603461] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:25:55,337 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:25:55,338 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-12 22:25:55,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160969261] [2021-06-12 22:25:55,338 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-12 22:25:55,338 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:25:55,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-12 22:25:55,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1372, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 22:25:55,338 INFO L87 Difference]: Start difference. First operand 7128 states and 21629 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:25:57,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:25:57,277 INFO L93 Difference]: Finished difference Result 8073 states and 24417 transitions. [2021-06-12 22:25:57,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-12 22:25:57,278 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-12 22:25:57,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:25:57,288 INFO L225 Difference]: With dead ends: 8073 [2021-06-12 22:25:57,288 INFO L226 Difference]: Without dead ends: 8033 [2021-06-12 22:25:57,288 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 847 ImplicationChecksByTransitivity, 2067.6ms TimeCoverageRelationStatistics Valid=274, Invalid=3266, Unknown=0, NotChecked=0, Total=3540 [2021-06-12 22:25:57,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8033 states. [2021-06-12 22:25:57,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8033 to 7132. [2021-06-12 22:25:57,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7132 states, 7131 states have (on average 3.0340765671013883) internal successors, (21636), 7131 states have internal predecessors, (21636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:25:57,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7132 states to 7132 states and 21636 transitions. [2021-06-12 22:25:57,375 INFO L78 Accepts]: Start accepts. Automaton has 7132 states and 21636 transitions. Word has length 48 [2021-06-12 22:25:57,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:25:57,375 INFO L482 AbstractCegarLoop]: Abstraction has 7132 states and 21636 transitions. [2021-06-12 22:25:57,376 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:25:57,376 INFO L276 IsEmpty]: Start isEmpty. Operand 7132 states and 21636 transitions. [2021-06-12 22:25:57,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-12 22:25:57,383 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:25:57,383 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:25:57,583 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 156 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2021-06-12 22:25:57,583 INFO L430 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:25:57,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:25:57,583 INFO L82 PathProgramCache]: Analyzing trace with hash 409399940, now seen corresponding path program 70 times [2021-06-12 22:25:57,584 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:25:57,584 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966461298] [2021-06-12 22:25:57,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:25:57,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:25:57,990 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:25:57,991 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:25:57,991 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966461298] [2021-06-12 22:25:57,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [966461298] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:25:57,991 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1056065302] [2021-06-12 22:25:57,991 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:25:58,030 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:25:58,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:25:58,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-12 22:25:58,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:25:58,190 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:25:58,191 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:25:58,207 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:25:58,208 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:25:58,208 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-12 22:25:58,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-12 22:25:58,372 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:25:58,385 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:25:58,386 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:25:58,386 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:32 [2021-06-12 22:25:58,802 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:25:58,802 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1056065302] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:25:58,802 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:25:58,802 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-12 22:25:58,802 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158396995] [2021-06-12 22:25:58,802 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-12 22:25:58,802 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:25:58,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-12 22:25:58,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1370, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 22:25:58,803 INFO L87 Difference]: Start difference. First operand 7132 states and 21636 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:26:00,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:26:00,660 INFO L93 Difference]: Finished difference Result 9309 states and 27985 transitions. [2021-06-12 22:26:00,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-12 22:26:00,660 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-12 22:26:00,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:26:00,671 INFO L225 Difference]: With dead ends: 9309 [2021-06-12 22:26:00,672 INFO L226 Difference]: Without dead ends: 9262 [2021-06-12 22:26:00,672 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 810 ImplicationChecksByTransitivity, 1809.5ms TimeCoverageRelationStatistics Valid=235, Invalid=3071, Unknown=0, NotChecked=0, Total=3306 [2021-06-12 22:26:00,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9262 states. [2021-06-12 22:26:00,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9262 to 7120. [2021-06-12 22:26:00,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7120 states, 7119 states have (on average 3.0361005759235846) internal successors, (21614), 7119 states have internal predecessors, (21614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:26:00,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7120 states to 7120 states and 21614 transitions. [2021-06-12 22:26:00,771 INFO L78 Accepts]: Start accepts. Automaton has 7120 states and 21614 transitions. Word has length 48 [2021-06-12 22:26:00,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:26:00,771 INFO L482 AbstractCegarLoop]: Abstraction has 7120 states and 21614 transitions. [2021-06-12 22:26:00,771 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:26:00,771 INFO L276 IsEmpty]: Start isEmpty. Operand 7120 states and 21614 transitions. [2021-06-12 22:26:00,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-12 22:26:00,778 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:26:00,778 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:26:00,979 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable159 [2021-06-12 22:26:00,979 INFO L430 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:26:00,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:26:00,979 INFO L82 PathProgramCache]: Analyzing trace with hash -2016058462, now seen corresponding path program 71 times [2021-06-12 22:26:00,979 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:26:00,979 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994321488] [2021-06-12 22:26:00,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:26:00,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:26:01,381 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:26:01,381 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:26:01,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994321488] [2021-06-12 22:26:01,382 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994321488] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:26:01,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1114391786] [2021-06-12 22:26:01,382 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:26:01,414 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 22:26:01,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:26:01,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 44 conjunts are in the unsatisfiable core [2021-06-12 22:26:01,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:26:01,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:26:01,543 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:26:01,556 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:26:01,556 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:26:01,556 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-12 22:26:01,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:26:01,751 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:26:01,762 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:26:01,762 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:26:01,762 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-06-12 22:26:02,182 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:26:02,182 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1114391786] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:26:02,182 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:26:02,182 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-12 22:26:02,183 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808987004] [2021-06-12 22:26:02,183 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-12 22:26:02,183 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:26:02,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-12 22:26:02,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1372, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 22:26:02,183 INFO L87 Difference]: Start difference. First operand 7120 states and 21614 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:26:04,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:26:04,125 INFO L93 Difference]: Finished difference Result 8071 states and 24415 transitions. [2021-06-12 22:26:04,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-12 22:26:04,125 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-12 22:26:04,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:26:04,135 INFO L225 Difference]: With dead ends: 8071 [2021-06-12 22:26:04,135 INFO L226 Difference]: Without dead ends: 8031 [2021-06-12 22:26:04,136 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 847 ImplicationChecksByTransitivity, 2026.6ms TimeCoverageRelationStatistics Valid=274, Invalid=3266, Unknown=0, NotChecked=0, Total=3540 [2021-06-12 22:26:04,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8031 states. [2021-06-12 22:26:04,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8031 to 7126. [2021-06-12 22:26:04,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7126 states, 7125 states have (on average 3.0353684210526315) internal successors, (21627), 7125 states have internal predecessors, (21627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:26:04,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7126 states to 7126 states and 21627 transitions. [2021-06-12 22:26:04,237 INFO L78 Accepts]: Start accepts. Automaton has 7126 states and 21627 transitions. Word has length 48 [2021-06-12 22:26:04,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:26:04,237 INFO L482 AbstractCegarLoop]: Abstraction has 7126 states and 21627 transitions. [2021-06-12 22:26:04,237 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:26:04,238 INFO L276 IsEmpty]: Start isEmpty. Operand 7126 states and 21627 transitions. [2021-06-12 22:26:04,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-12 22:26:04,245 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:26:04,245 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:26:04,445 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:26:04,445 INFO L430 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:26:04,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:26:04,445 INFO L82 PathProgramCache]: Analyzing trace with hash -252388532, now seen corresponding path program 72 times [2021-06-12 22:26:04,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:26:04,446 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171763775] [2021-06-12 22:26:04,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:26:04,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:26:04,849 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:26:04,849 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:26:04,849 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171763775] [2021-06-12 22:26:04,850 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1171763775] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:26:04,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1942295303] [2021-06-12 22:26:04,850 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:26:04,882 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 22:26:04,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:26:04,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-12 22:26:04,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:26:05,006 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:26:05,006 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:26:05,019 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:26:05,019 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:26:05,019 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-12 22:26:05,177 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:26:05,178 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:26:05,189 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:26:05,189 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:26:05,189 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-06-12 22:26:05,607 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:26:05,607 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1942295303] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:26:05,608 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:26:05,608 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-12 22:26:05,608 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528817626] [2021-06-12 22:26:05,608 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-12 22:26:05,608 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:26:05,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-12 22:26:05,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1370, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 22:26:05,608 INFO L87 Difference]: Start difference. First operand 7126 states and 21627 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:26:07,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:26:07,232 INFO L93 Difference]: Finished difference Result 9307 states and 27984 transitions. [2021-06-12 22:26:07,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-12 22:26:07,232 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-12 22:26:07,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:26:07,243 INFO L225 Difference]: With dead ends: 9307 [2021-06-12 22:26:07,244 INFO L226 Difference]: Without dead ends: 9219 [2021-06-12 22:26:07,244 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 810 ImplicationChecksByTransitivity, 1763.7ms TimeCoverageRelationStatistics Valid=235, Invalid=3071, Unknown=0, NotChecked=0, Total=3306 [2021-06-12 22:26:07,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9219 states. [2021-06-12 22:26:07,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9219 to 7077. [2021-06-12 22:26:07,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7077 states, 7076 states have (on average 3.0416902204635385) internal successors, (21523), 7076 states have internal predecessors, (21523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:26:07,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7077 states to 7077 states and 21523 transitions. [2021-06-12 22:26:07,341 INFO L78 Accepts]: Start accepts. Automaton has 7077 states and 21523 transitions. Word has length 48 [2021-06-12 22:26:07,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:26:07,341 INFO L482 AbstractCegarLoop]: Abstraction has 7077 states and 21523 transitions. [2021-06-12 22:26:07,341 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:26:07,341 INFO L276 IsEmpty]: Start isEmpty. Operand 7077 states and 21523 transitions. [2021-06-12 22:26:07,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-12 22:26:07,348 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:26:07,348 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:26:07,549 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable161 [2021-06-12 22:26:07,549 INFO L430 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:26:07,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:26:07,549 INFO L82 PathProgramCache]: Analyzing trace with hash 2041318758, now seen corresponding path program 73 times [2021-06-12 22:26:07,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:26:07,549 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136982834] [2021-06-12 22:26:07,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:26:07,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:26:07,946 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:26:07,946 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:26:07,946 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136982834] [2021-06-12 22:26:07,946 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136982834] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:26:07,946 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [738770754] [2021-06-12 22:26:07,946 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:26:07,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:26:07,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-12 22:26:07,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:26:08,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:26:08,108 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:26:08,126 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:26:08,127 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:26:08,127 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-12 22:26:08,291 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:26:08,292 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:26:08,303 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:26:08,303 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:26:08,303 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-06-12 22:26:08,711 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:26:08,711 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [738770754] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:26:08,711 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:26:08,711 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-12 22:26:08,711 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372417245] [2021-06-12 22:26:08,711 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-12 22:26:08,711 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:26:08,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-12 22:26:08,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1370, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 22:26:08,712 INFO L87 Difference]: Start difference. First operand 7077 states and 21523 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:26:10,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:26:10,331 INFO L93 Difference]: Finished difference Result 9366 states and 28146 transitions. [2021-06-12 22:26:10,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-12 22:26:10,331 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-12 22:26:10,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:26:10,342 INFO L225 Difference]: With dead ends: 9366 [2021-06-12 22:26:10,343 INFO L226 Difference]: Without dead ends: 9248 [2021-06-12 22:26:10,343 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 844 ImplicationChecksByTransitivity, 1831.8ms TimeCoverageRelationStatistics Valid=241, Invalid=3181, Unknown=0, NotChecked=0, Total=3422 [2021-06-12 22:26:10,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9248 states. [2021-06-12 22:26:10,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9248 to 7097. [2021-06-12 22:26:10,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7097 states, 7096 states have (on average 3.0386133032694476) internal successors, (21562), 7096 states have internal predecessors, (21562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:26:10,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7097 states to 7097 states and 21562 transitions. [2021-06-12 22:26:10,442 INFO L78 Accepts]: Start accepts. Automaton has 7097 states and 21562 transitions. Word has length 48 [2021-06-12 22:26:10,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:26:10,442 INFO L482 AbstractCegarLoop]: Abstraction has 7097 states and 21562 transitions. [2021-06-12 22:26:10,442 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:26:10,442 INFO L276 IsEmpty]: Start isEmpty. Operand 7097 states and 21562 transitions. [2021-06-12 22:26:10,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-12 22:26:10,449 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:26:10,449 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:26:10,649 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:26:10,649 INFO L430 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:26:10,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:26:10,650 INFO L82 PathProgramCache]: Analyzing trace with hash -2146198170, now seen corresponding path program 74 times [2021-06-12 22:26:10,650 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:26:10,650 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286468612] [2021-06-12 22:26:10,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:26:10,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:26:11,077 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:26:11,077 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:26:11,077 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286468612] [2021-06-12 22:26:11,077 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286468612] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:26:11,077 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [763650788] [2021-06-12 22:26:11,077 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:26:11,110 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:26:11,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:26:11,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-12 22:26:11,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:26:11,240 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:26:11,241 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:26:11,253 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:26:11,254 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:26:11,254 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-12 22:26:11,417 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:26:11,417 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:26:11,428 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:26:11,429 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:26:11,429 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-06-12 22:26:11,936 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:26:11,936 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [763650788] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:26:11,937 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:26:11,937 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 40 [2021-06-12 22:26:11,937 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473113912] [2021-06-12 22:26:11,937 INFO L462 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-06-12 22:26:11,937 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:26:11,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-06-12 22:26:11,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1525, Unknown=0, NotChecked=0, Total=1640 [2021-06-12 22:26:11,937 INFO L87 Difference]: Start difference. First operand 7097 states and 21562 transitions. Second operand has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:26:13,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:26:13,929 INFO L93 Difference]: Finished difference Result 8046 states and 24360 transitions. [2021-06-12 22:26:13,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-12 22:26:13,930 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-12 22:26:13,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:26:13,940 INFO L225 Difference]: With dead ends: 8046 [2021-06-12 22:26:13,940 INFO L226 Difference]: Without dead ends: 8006 [2021-06-12 22:26:13,940 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 892 ImplicationChecksByTransitivity, 2179.3ms TimeCoverageRelationStatistics Valid=274, Invalid=3508, Unknown=0, NotChecked=0, Total=3782 [2021-06-12 22:26:13,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8006 states. [2021-06-12 22:26:14,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8006 to 7109. [2021-06-12 22:26:14,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7109 states, 7108 states have (on average 3.037563308947665) internal successors, (21591), 7108 states have internal predecessors, (21591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:26:14,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7109 states to 7109 states and 21591 transitions. [2021-06-12 22:26:14,048 INFO L78 Accepts]: Start accepts. Automaton has 7109 states and 21591 transitions. Word has length 48 [2021-06-12 22:26:14,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:26:14,048 INFO L482 AbstractCegarLoop]: Abstraction has 7109 states and 21591 transitions. [2021-06-12 22:26:14,048 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:26:14,048 INFO L276 IsEmpty]: Start isEmpty. Operand 7109 states and 21591 transitions. [2021-06-12 22:26:14,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-12 22:26:14,055 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:26:14,055 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:26:14,256 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,161 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:26:14,257 INFO L430 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:26:14,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:26:14,257 INFO L82 PathProgramCache]: Analyzing trace with hash 1272586662, now seen corresponding path program 75 times [2021-06-12 22:26:14,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:26:14,257 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381531925] [2021-06-12 22:26:14,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:26:14,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:26:14,692 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:26:14,692 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:26:14,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381531925] [2021-06-12 22:26:14,692 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381531925] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:26:14,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [233666809] [2021-06-12 22:26:14,692 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:26:14,725 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 22:26:14,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:26:14,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-12 22:26:14,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:26:14,856 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:26:14,857 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:26:14,870 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:26:14,870 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:26:14,870 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-12 22:26:15,043 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-12 22:26:15,044 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:26:15,055 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:26:15,056 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:26:15,056 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:32 [2021-06-12 22:26:15,518 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:26:15,518 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [233666809] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:26:15,518 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:26:15,518 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 40 [2021-06-12 22:26:15,518 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690003222] [2021-06-12 22:26:15,519 INFO L462 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-06-12 22:26:15,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:26:15,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-06-12 22:26:15,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1523, Unknown=0, NotChecked=0, Total=1640 [2021-06-12 22:26:15,519 INFO L87 Difference]: Start difference. First operand 7109 states and 21591 transitions. Second operand has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:26:17,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:26:17,126 INFO L93 Difference]: Finished difference Result 9299 states and 27972 transitions. [2021-06-12 22:26:17,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-12 22:26:17,127 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-12 22:26:17,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:26:17,138 INFO L225 Difference]: With dead ends: 9299 [2021-06-12 22:26:17,138 INFO L226 Difference]: Without dead ends: 9260 [2021-06-12 22:26:17,138 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 853 ImplicationChecksByTransitivity, 1935.8ms TimeCoverageRelationStatistics Valid=239, Invalid=3301, Unknown=0, NotChecked=0, Total=3540 [2021-06-12 22:26:17,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9260 states. [2021-06-12 22:26:17,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9260 to 7105. [2021-06-12 22:26:17,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7105 states, 7104 states have (on average 3.037725225225225) internal successors, (21580), 7104 states have internal predecessors, (21580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:26:17,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7105 states to 7105 states and 21580 transitions. [2021-06-12 22:26:17,239 INFO L78 Accepts]: Start accepts. Automaton has 7105 states and 21580 transitions. Word has length 48 [2021-06-12 22:26:17,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:26:17,239 INFO L482 AbstractCegarLoop]: Abstraction has 7105 states and 21580 transitions. [2021-06-12 22:26:17,239 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:26:17,239 INFO L276 IsEmpty]: Start isEmpty. Operand 7105 states and 21580 transitions. [2021-06-12 22:26:17,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-12 22:26:17,247 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:26:17,247 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:26:17,447 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:26:17,447 INFO L430 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:26:17,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:26:17,448 INFO L82 PathProgramCache]: Analyzing trace with hash 1414301802, now seen corresponding path program 76 times [2021-06-12 22:26:17,448 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:26:17,448 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881401459] [2021-06-12 22:26:17,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:26:17,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:26:17,860 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:26:17,860 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:26:17,860 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881401459] [2021-06-12 22:26:17,860 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881401459] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:26:17,860 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [687276776] [2021-06-12 22:26:17,860 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:26:17,895 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:26:17,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:26:17,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-12 22:26:17,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:26:18,030 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:26:18,031 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:26:18,043 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:26:18,044 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:26:18,044 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-12 22:26:18,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:26:18,207 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:26:18,218 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:26:18,218 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:26:18,219 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-06-12 22:26:18,700 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:26:18,700 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [687276776] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:26:18,700 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:26:18,700 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 40 [2021-06-12 22:26:18,701 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669403940] [2021-06-12 22:26:18,701 INFO L462 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-06-12 22:26:18,701 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:26:18,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-06-12 22:26:18,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1523, Unknown=0, NotChecked=0, Total=1640 [2021-06-12 22:26:18,701 INFO L87 Difference]: Start difference. First operand 7105 states and 21580 transitions. Second operand has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:26:20,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:26:20,224 INFO L93 Difference]: Finished difference Result 9309 states and 27993 transitions. [2021-06-12 22:26:20,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-12 22:26:20,224 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-12 22:26:20,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:26:20,236 INFO L225 Difference]: With dead ends: 9309 [2021-06-12 22:26:20,237 INFO L226 Difference]: Without dead ends: 9252 [2021-06-12 22:26:20,237 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 852 ImplicationChecksByTransitivity, 1885.0ms TimeCoverageRelationStatistics Valid=239, Invalid=3301, Unknown=0, NotChecked=0, Total=3540 [2021-06-12 22:26:20,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9252 states. [2021-06-12 22:26:20,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9252 to 7101. [2021-06-12 22:26:20,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7101 states, 7100 states have (on average 3.037887323943662) internal successors, (21569), 7100 states have internal predecessors, (21569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:26:20,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7101 states to 7101 states and 21569 transitions. [2021-06-12 22:26:20,340 INFO L78 Accepts]: Start accepts. Automaton has 7101 states and 21569 transitions. Word has length 48 [2021-06-12 22:26:20,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:26:20,340 INFO L482 AbstractCegarLoop]: Abstraction has 7101 states and 21569 transitions. [2021-06-12 22:26:20,340 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:26:20,340 INFO L276 IsEmpty]: Start isEmpty. Operand 7101 states and 21569 transitions. [2021-06-12 22:26:20,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-12 22:26:20,347 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:26:20,347 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:26:20,547 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165,163 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:26:20,548 INFO L430 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:26:20,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:26:20,548 INFO L82 PathProgramCache]: Analyzing trace with hash 131154342, now seen corresponding path program 77 times [2021-06-12 22:26:20,548 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:26:20,548 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606255716] [2021-06-12 22:26:20,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:26:20,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:26:20,966 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:26:20,966 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:26:20,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606255716] [2021-06-12 22:26:20,966 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606255716] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:26:20,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413684256] [2021-06-12 22:26:20,966 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:26:21,001 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 22:26:21,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:26:21,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-12 22:26:21,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:26:21,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:26:21,139 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:26:21,152 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:26:21,152 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:26:21,152 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-12 22:26:21,314 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:26:21,315 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:26:21,326 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:26:21,327 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:26:21,327 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-06-12 22:26:21,819 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:26:21,819 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1413684256] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:26:21,819 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:26:21,819 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 40 [2021-06-12 22:26:21,820 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143227675] [2021-06-12 22:26:21,820 INFO L462 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-06-12 22:26:21,820 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:26:21,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-06-12 22:26:21,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=1521, Unknown=0, NotChecked=0, Total=1640 [2021-06-12 22:26:21,820 INFO L87 Difference]: Start difference. First operand 7101 states and 21569 transitions. Second operand has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:26:23,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:26:23,615 INFO L93 Difference]: Finished difference Result 9318 states and 28013 transitions. [2021-06-12 22:26:23,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-12 22:26:23,616 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-12 22:26:23,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:26:23,627 INFO L225 Difference]: With dead ends: 9318 [2021-06-12 22:26:23,628 INFO L226 Difference]: Without dead ends: 9232 [2021-06-12 22:26:23,628 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 873 ImplicationChecksByTransitivity, 1880.2ms TimeCoverageRelationStatistics Valid=242, Invalid=3298, Unknown=0, NotChecked=0, Total=3540 [2021-06-12 22:26:23,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9232 states. [2021-06-12 22:26:23,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9232 to 7081. [2021-06-12 22:26:23,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7081 states, 7080 states have (on average 3.040960451977401) internal successors, (21530), 7080 states have internal predecessors, (21530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:26:23,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7081 states to 7081 states and 21530 transitions. [2021-06-12 22:26:23,725 INFO L78 Accepts]: Start accepts. Automaton has 7081 states and 21530 transitions. Word has length 48 [2021-06-12 22:26:23,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:26:23,725 INFO L482 AbstractCegarLoop]: Abstraction has 7081 states and 21530 transitions. [2021-06-12 22:26:23,725 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:26:23,725 INFO L276 IsEmpty]: Start isEmpty. Operand 7081 states and 21530 transitions. [2021-06-12 22:26:23,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-12 22:26:23,732 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:26:23,732 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:26:23,932 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable166 [2021-06-12 22:26:23,933 INFO L430 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:26:23,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:26:23,933 INFO L82 PathProgramCache]: Analyzing trace with hash -610968018, now seen corresponding path program 78 times [2021-06-12 22:26:23,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:26:23,933 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459181389] [2021-06-12 22:26:23,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:26:23,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:26:24,398 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:26:24,398 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:26:24,398 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459181389] [2021-06-12 22:26:24,398 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459181389] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:26:24,399 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1515965695] [2021-06-12 22:26:24,399 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:26:24,431 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 22:26:24,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:26:24,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-12 22:26:24,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:26:24,575 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:26:24,575 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:26:24,588 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:26:24,588 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:26:24,589 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-12 22:26:24,792 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:26:24,793 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:26:24,807 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:26:24,808 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:26:24,808 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-06-12 22:26:25,235 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:26:25,235 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1515965695] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:26:25,235 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:26:25,235 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-12 22:26:25,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558112703] [2021-06-12 22:26:25,235 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-12 22:26:25,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:26:25,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-12 22:26:25,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1370, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 22:26:25,236 INFO L87 Difference]: Start difference. First operand 7081 states and 21530 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:26:26,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:26:26,722 INFO L93 Difference]: Finished difference Result 9350 states and 28098 transitions. [2021-06-12 22:26:26,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-12 22:26:26,722 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-12 22:26:26,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:26:26,733 INFO L225 Difference]: With dead ends: 9350 [2021-06-12 22:26:26,733 INFO L226 Difference]: Without dead ends: 9215 [2021-06-12 22:26:26,733 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 844 ImplicationChecksByTransitivity, 1897.5ms TimeCoverageRelationStatistics Valid=241, Invalid=3181, Unknown=0, NotChecked=0, Total=3422 [2021-06-12 22:26:26,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9215 states. [2021-06-12 22:26:26,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9215 to 7077. [2021-06-12 22:26:26,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7077 states, 7076 states have (on average 3.0415488976823064) internal successors, (21522), 7076 states have internal predecessors, (21522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:26:26,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7077 states to 7077 states and 21522 transitions. [2021-06-12 22:26:26,829 INFO L78 Accepts]: Start accepts. Automaton has 7077 states and 21522 transitions. Word has length 48 [2021-06-12 22:26:26,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:26:26,829 INFO L482 AbstractCegarLoop]: Abstraction has 7077 states and 21522 transitions. [2021-06-12 22:26:26,829 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:26:26,830 INFO L276 IsEmpty]: Start isEmpty. Operand 7077 states and 21522 transitions. [2021-06-12 22:26:26,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-12 22:26:26,836 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:26:26,837 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:26:27,037 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable167 [2021-06-12 22:26:27,037 INFO L430 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:26:27,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:26:27,037 INFO L82 PathProgramCache]: Analyzing trace with hash 1956793902, now seen corresponding path program 79 times [2021-06-12 22:26:27,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:26:27,037 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670328110] [2021-06-12 22:26:27,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:26:27,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:26:27,481 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:26:27,482 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:26:27,482 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670328110] [2021-06-12 22:26:27,482 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1670328110] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:26:27,482 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1236329870] [2021-06-12 22:26:27,482 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:26:27,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:26:27,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-12 22:26:27,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:26:27,642 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:26:27,643 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:26:27,656 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:26:27,656 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:26:27,656 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-12 22:26:27,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:26:27,818 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:26:27,829 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:26:27,830 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:26:27,830 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-06-12 22:26:28,256 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:26:28,256 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1236329870] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:26:28,256 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:26:28,256 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-12 22:26:28,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151046265] [2021-06-12 22:26:28,257 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-12 22:26:28,257 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:26:28,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-12 22:26:28,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1370, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 22:26:28,257 INFO L87 Difference]: Start difference. First operand 7077 states and 21522 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:26:30,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:26:30,173 INFO L93 Difference]: Finished difference Result 9406 states and 28238 transitions. [2021-06-12 22:26:30,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-12 22:26:30,174 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-12 22:26:30,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:26:30,185 INFO L225 Difference]: With dead ends: 9406 [2021-06-12 22:26:30,185 INFO L226 Difference]: Without dead ends: 9288 [2021-06-12 22:26:30,186 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 844 ImplicationChecksByTransitivity, 1851.8ms TimeCoverageRelationStatistics Valid=241, Invalid=3181, Unknown=0, NotChecked=0, Total=3422 [2021-06-12 22:26:30,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9288 states. [2021-06-12 22:26:30,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9288 to 7155. [2021-06-12 22:26:30,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7155 states, 7154 states have (on average 3.0341067934022923) internal successors, (21706), 7154 states have internal predecessors, (21706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:26:30,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7155 states to 7155 states and 21706 transitions. [2021-06-12 22:26:30,280 INFO L78 Accepts]: Start accepts. Automaton has 7155 states and 21706 transitions. Word has length 48 [2021-06-12 22:26:30,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:26:30,280 INFO L482 AbstractCegarLoop]: Abstraction has 7155 states and 21706 transitions. [2021-06-12 22:26:30,280 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:26:30,280 INFO L276 IsEmpty]: Start isEmpty. Operand 7155 states and 21706 transitions. [2021-06-12 22:26:30,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-12 22:26:30,287 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:26:30,287 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:26:30,487 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable168,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:26:30,488 INFO L430 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:26:30,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:26:30,488 INFO L82 PathProgramCache]: Analyzing trace with hash 575356984, now seen corresponding path program 80 times [2021-06-12 22:26:30,488 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:26:30,488 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398657283] [2021-06-12 22:26:30,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:26:30,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:26:30,911 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:26:30,912 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:26:30,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398657283] [2021-06-12 22:26:30,912 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1398657283] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:26:30,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [935658278] [2021-06-12 22:26:30,912 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:26:30,944 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:26:30,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:26:30,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-12 22:26:30,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:26:31,075 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:26:31,076 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:26:31,088 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:26:31,089 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:26:31,089 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-12 22:26:31,250 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:26:31,250 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:26:31,261 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:26:31,262 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:26:31,262 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-06-12 22:26:31,776 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:26:31,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [935658278] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:26:31,776 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:26:31,777 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 40 [2021-06-12 22:26:31,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510117311] [2021-06-12 22:26:31,777 INFO L462 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-06-12 22:26:31,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:26:31,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-06-12 22:26:31,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1525, Unknown=0, NotChecked=0, Total=1640 [2021-06-12 22:26:31,777 INFO L87 Difference]: Start difference. First operand 7155 states and 21706 transitions. Second operand has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:26:34,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:26:34,022 INFO L93 Difference]: Finished difference Result 8078 states and 24431 transitions. [2021-06-12 22:26:34,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-12 22:26:34,023 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-12 22:26:34,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:26:34,033 INFO L225 Difference]: With dead ends: 8078 [2021-06-12 22:26:34,033 INFO L226 Difference]: Without dead ends: 8038 [2021-06-12 22:26:34,033 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 892 ImplicationChecksByTransitivity, 2186.2ms TimeCoverageRelationStatistics Valid=274, Invalid=3508, Unknown=0, NotChecked=0, Total=3782 [2021-06-12 22:26:34,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8038 states. [2021-06-12 22:26:34,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8038 to 7173. [2021-06-12 22:26:34,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7173 states, 7172 states have (on average 3.03276631344116) internal successors, (21751), 7172 states have internal predecessors, (21751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:26:34,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7173 states to 7173 states and 21751 transitions. [2021-06-12 22:26:34,136 INFO L78 Accepts]: Start accepts. Automaton has 7173 states and 21751 transitions. Word has length 48 [2021-06-12 22:26:34,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:26:34,136 INFO L482 AbstractCegarLoop]: Abstraction has 7173 states and 21751 transitions. [2021-06-12 22:26:34,136 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:26:34,136 INFO L276 IsEmpty]: Start isEmpty. Operand 7173 states and 21751 transitions. [2021-06-12 22:26:34,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-12 22:26:34,143 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:26:34,143 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:26:34,343 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2021-06-12 22:26:34,343 INFO L430 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:26:34,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:26:34,343 INFO L82 PathProgramCache]: Analyzing trace with hash 346598140, now seen corresponding path program 81 times [2021-06-12 22:26:34,344 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:26:34,344 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235998160] [2021-06-12 22:26:34,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:26:34,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:26:34,856 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:26:34,856 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:26:34,856 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235998160] [2021-06-12 22:26:34,856 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [235998160] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:26:34,856 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [932287419] [2021-06-12 22:26:34,856 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:26:34,890 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 22:26:34,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:26:34,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-12 22:26:34,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:26:35,022 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:26:35,022 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:26:35,035 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:26:35,035 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:26:35,035 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-12 22:26:35,289 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-12 22:26:35,290 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:26:35,301 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:26:35,301 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:26:35,301 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:32 [2021-06-12 22:26:35,769 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:26:35,770 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [932287419] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:26:35,770 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:26:35,770 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 23] total 42 [2021-06-12 22:26:35,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713800509] [2021-06-12 22:26:35,770 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-06-12 22:26:35,770 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:26:35,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-06-12 22:26:35,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=1679, Unknown=0, NotChecked=0, Total=1806 [2021-06-12 22:26:35,771 INFO L87 Difference]: Start difference. First operand 7173 states and 21751 transitions. Second operand has 43 states, 43 states have (on average 2.046511627906977) internal successors, (88), 42 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:26:37,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:26:37,803 INFO L93 Difference]: Finished difference Result 9349 states and 28092 transitions. [2021-06-12 22:26:37,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-12 22:26:37,803 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.046511627906977) internal successors, (88), 42 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-12 22:26:37,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:26:37,815 INFO L225 Difference]: With dead ends: 9349 [2021-06-12 22:26:37,815 INFO L226 Difference]: Without dead ends: 9304 [2021-06-12 22:26:37,815 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 977 ImplicationChecksByTransitivity, 2098.8ms TimeCoverageRelationStatistics Valid=256, Invalid=3526, Unknown=0, NotChecked=0, Total=3782 [2021-06-12 22:26:37,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9304 states. [2021-06-12 22:26:37,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9304 to 7167. [2021-06-12 22:26:37,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7167 states, 7166 states have (on average 3.032654200390734) internal successors, (21732), 7166 states have internal predecessors, (21732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:26:37,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7167 states to 7167 states and 21732 transitions. [2021-06-12 22:26:37,912 INFO L78 Accepts]: Start accepts. Automaton has 7167 states and 21732 transitions. Word has length 48 [2021-06-12 22:26:37,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:26:37,912 INFO L482 AbstractCegarLoop]: Abstraction has 7167 states and 21732 transitions. [2021-06-12 22:26:37,912 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 2.046511627906977) internal successors, (88), 42 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:26:37,912 INFO L276 IsEmpty]: Start isEmpty. Operand 7167 states and 21732 transitions. [2021-06-12 22:26:37,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-12 22:26:37,919 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:26:37,919 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:26:38,119 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:26:38,119 INFO L430 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:26:38,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:26:38,120 INFO L82 PathProgramCache]: Analyzing trace with hash -600133660, now seen corresponding path program 82 times [2021-06-12 22:26:38,120 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:26:38,120 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179916494] [2021-06-12 22:26:38,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:26:38,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:26:38,556 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:26:38,556 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:26:38,557 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179916494] [2021-06-12 22:26:38,557 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [179916494] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:26:38,557 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [176067058] [2021-06-12 22:26:38,557 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:26:38,590 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:26:38,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:26:38,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-12 22:26:38,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:26:38,722 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:26:38,723 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:26:38,737 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:26:38,737 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:26:38,737 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-12 22:26:38,902 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:26:38,903 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:26:38,914 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:26:38,914 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:26:38,915 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-06-12 22:26:39,414 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:26:39,414 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [176067058] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:26:39,415 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:26:39,415 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 40 [2021-06-12 22:26:39,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955149602] [2021-06-12 22:26:39,415 INFO L462 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-06-12 22:26:39,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:26:39,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-06-12 22:26:39,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1523, Unknown=0, NotChecked=0, Total=1640 [2021-06-12 22:26:39,415 INFO L87 Difference]: Start difference. First operand 7167 states and 21732 transitions. Second operand has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:26:41,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:26:41,005 INFO L93 Difference]: Finished difference Result 9353 states and 28097 transitions. [2021-06-12 22:26:41,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-12 22:26:41,005 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-12 22:26:41,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:26:41,018 INFO L225 Difference]: With dead ends: 9353 [2021-06-12 22:26:41,018 INFO L226 Difference]: Without dead ends: 9294 [2021-06-12 22:26:41,019 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 852 ImplicationChecksByTransitivity, 1924.8ms TimeCoverageRelationStatistics Valid=239, Invalid=3301, Unknown=0, NotChecked=0, Total=3540 [2021-06-12 22:26:41,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9294 states. [2021-06-12 22:26:41,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9294 to 7161. [2021-06-12 22:26:41,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7161 states, 7160 states have (on average 3.0329608938547485) internal successors, (21716), 7160 states have internal predecessors, (21716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:26:41,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7161 states to 7161 states and 21716 transitions. [2021-06-12 22:26:41,129 INFO L78 Accepts]: Start accepts. Automaton has 7161 states and 21716 transitions. Word has length 48 [2021-06-12 22:26:41,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:26:41,129 INFO L482 AbstractCegarLoop]: Abstraction has 7161 states and 21716 transitions. [2021-06-12 22:26:41,129 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:26:41,129 INFO L276 IsEmpty]: Start isEmpty. Operand 7161 states and 21716 transitions. [2021-06-12 22:26:41,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-12 22:26:41,136 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:26:41,136 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:26:41,337 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable171 [2021-06-12 22:26:41,337 INFO L430 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:26:41,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:26:41,337 INFO L82 PathProgramCache]: Analyzing trace with hash -754571178, now seen corresponding path program 83 times [2021-06-12 22:26:41,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:26:41,337 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528541227] [2021-06-12 22:26:41,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:26:41,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:26:41,802 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:26:41,802 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:26:41,802 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528541227] [2021-06-12 22:26:41,802 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528541227] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:26:41,802 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113694639] [2021-06-12 22:26:41,802 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:26:41,835 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 22:26:41,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:26:41,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-12 22:26:41,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:26:41,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:26:41,963 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:26:41,975 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:26:41,976 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:26:41,976 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-12 22:26:42,141 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:26:42,142 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:26:42,153 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:26:42,154 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:26:42,154 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-06-12 22:26:42,613 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:26:42,614 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1113694639] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:26:42,614 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:26:42,614 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 40 [2021-06-12 22:26:42,614 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022830724] [2021-06-12 22:26:42,614 INFO L462 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-06-12 22:26:42,614 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:26:42,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-06-12 22:26:42,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=1521, Unknown=0, NotChecked=0, Total=1640 [2021-06-12 22:26:42,614 INFO L87 Difference]: Start difference. First operand 7161 states and 21716 transitions. Second operand has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:26:44,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:26:44,458 INFO L93 Difference]: Finished difference Result 9360 states and 28112 transitions. [2021-06-12 22:26:44,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-12 22:26:44,458 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-12 22:26:44,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:26:44,469 INFO L225 Difference]: With dead ends: 9360 [2021-06-12 22:26:44,469 INFO L226 Difference]: Without dead ends: 9228 [2021-06-12 22:26:44,469 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 873 ImplicationChecksByTransitivity, 1899.4ms TimeCoverageRelationStatistics Valid=242, Invalid=3298, Unknown=0, NotChecked=0, Total=3540 [2021-06-12 22:26:44,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9228 states. [2021-06-12 22:26:44,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9228 to 7095. [2021-06-12 22:26:44,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7095 states, 7094 states have (on average 3.0380603326755002) internal successors, (21552), 7094 states have internal predecessors, (21552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:26:44,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7095 states to 7095 states and 21552 transitions. [2021-06-12 22:26:44,561 INFO L78 Accepts]: Start accepts. Automaton has 7095 states and 21552 transitions. Word has length 48 [2021-06-12 22:26:44,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:26:44,561 INFO L482 AbstractCegarLoop]: Abstraction has 7095 states and 21552 transitions. [2021-06-12 22:26:44,561 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:26:44,561 INFO L276 IsEmpty]: Start isEmpty. Operand 7095 states and 21552 transitions. [2021-06-12 22:26:44,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-12 22:26:44,568 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:26:44,568 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:26:44,768 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:26:44,768 INFO L430 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:26:44,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:26:44,768 INFO L82 PathProgramCache]: Analyzing trace with hash 176826316, now seen corresponding path program 84 times [2021-06-12 22:26:44,768 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:26:44,768 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884001736] [2021-06-12 22:26:44,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:26:44,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:26:45,173 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:26:45,173 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:26:45,173 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884001736] [2021-06-12 22:26:45,174 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884001736] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:26:45,174 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [666837810] [2021-06-12 22:26:45,174 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:26:45,207 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 22:26:45,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:26:45,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 44 conjunts are in the unsatisfiable core [2021-06-12 22:26:45,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:26:45,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:26:45,335 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:26:45,347 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:26:45,347 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:26:45,348 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-12 22:26:45,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:26:45,506 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:26:45,517 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:26:45,517 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:26:45,518 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-06-12 22:26:46,014 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:26:46,014 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [666837810] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:26:46,014 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:26:46,014 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22] total 40 [2021-06-12 22:26:46,014 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743612749] [2021-06-12 22:26:46,014 INFO L462 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-06-12 22:26:46,014 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:26:46,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-06-12 22:26:46,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=1517, Unknown=0, NotChecked=0, Total=1640 [2021-06-12 22:26:46,015 INFO L87 Difference]: Start difference. First operand 7095 states and 21552 transitions. Second operand has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:26:47,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:26:47,750 INFO L93 Difference]: Finished difference Result 9346 states and 28072 transitions. [2021-06-12 22:26:47,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-12 22:26:47,751 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-12 22:26:47,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:26:47,762 INFO L225 Difference]: With dead ends: 9346 [2021-06-12 22:26:47,762 INFO L226 Difference]: Without dead ends: 9188 [2021-06-12 22:26:47,763 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1050 ImplicationChecksByTransitivity, 2061.3ms TimeCoverageRelationStatistics Valid=275, Invalid=3757, Unknown=0, NotChecked=0, Total=4032 [2021-06-12 22:26:47,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9188 states. [2021-06-12 22:26:47,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9188 to 7068. [2021-06-12 22:26:47,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7068 states, 7067 states have (on average 3.0427338333097493) internal successors, (21503), 7067 states have internal predecessors, (21503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:26:47,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7068 states to 7068 states and 21503 transitions. [2021-06-12 22:26:47,859 INFO L78 Accepts]: Start accepts. Automaton has 7068 states and 21503 transitions. Word has length 48 [2021-06-12 22:26:47,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:26:47,859 INFO L482 AbstractCegarLoop]: Abstraction has 7068 states and 21503 transitions. [2021-06-12 22:26:47,859 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:26:47,859 INFO L276 IsEmpty]: Start isEmpty. Operand 7068 states and 21503 transitions. [2021-06-12 22:26:47,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-12 22:26:47,866 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:26:47,866 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:26:48,068 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,171 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:26:48,069 INFO L430 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:26:48,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:26:48,069 INFO L82 PathProgramCache]: Analyzing trace with hash -123603070, now seen corresponding path program 85 times [2021-06-12 22:26:48,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:26:48,069 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430100872] [2021-06-12 22:26:48,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:26:48,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:26:48,465 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:26:48,466 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:26:48,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430100872] [2021-06-12 22:26:48,466 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1430100872] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:26:48,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [646753264] [2021-06-12 22:26:48,466 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:26:48,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:26:48,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-12 22:26:48,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:26:48,624 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:26:48,625 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:26:48,637 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:26:48,638 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:26:48,638 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-12 22:26:48,789 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-12 22:26:48,789 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:26:48,800 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:26:48,801 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:26:48,801 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:32 [2021-06-12 22:26:49,230 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:26:49,230 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [646753264] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:26:49,231 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:26:49,231 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-12 22:26:49,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173074352] [2021-06-12 22:26:49,231 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-12 22:26:49,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:26:49,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-12 22:26:49,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1362, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 22:26:49,231 INFO L87 Difference]: Start difference. First operand 7068 states and 21503 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:26:51,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:26:51,176 INFO L93 Difference]: Finished difference Result 9541 states and 28637 transitions. [2021-06-12 22:26:51,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-12 22:26:51,177 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-12 22:26:51,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:26:51,188 INFO L225 Difference]: With dead ends: 9541 [2021-06-12 22:26:51,188 INFO L226 Difference]: Without dead ends: 9397 [2021-06-12 22:26:51,189 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 968 ImplicationChecksByTransitivity, 1872.3ms TimeCoverageRelationStatistics Valid=273, Invalid=3387, Unknown=0, NotChecked=0, Total=3660 [2021-06-12 22:26:51,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9397 states. [2021-06-12 22:26:51,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9397 to 7137. [2021-06-12 22:26:51,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7137 states, 7136 states have (on average 3.038957399103139) internal successors, (21686), 7136 states have internal predecessors, (21686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:26:51,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7137 states to 7137 states and 21686 transitions. [2021-06-12 22:26:51,331 INFO L78 Accepts]: Start accepts. Automaton has 7137 states and 21686 transitions. Word has length 48 [2021-06-12 22:26:51,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:26:51,331 INFO L482 AbstractCegarLoop]: Abstraction has 7137 states and 21686 transitions. [2021-06-12 22:26:51,331 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:26:51,331 INFO L276 IsEmpty]: Start isEmpty. Operand 7137 states and 21686 transitions. [2021-06-12 22:26:51,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-12 22:26:51,338 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:26:51,338 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:26:51,539 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:26:51,539 INFO L430 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:26:51,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:26:51,539 INFO L82 PathProgramCache]: Analyzing trace with hash -16152702, now seen corresponding path program 86 times [2021-06-12 22:26:51,539 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:26:51,540 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426578494] [2021-06-12 22:26:51,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:26:51,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:26:51,983 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:26:51,983 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:26:51,983 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426578494] [2021-06-12 22:26:51,983 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426578494] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:26:51,983 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [940065995] [2021-06-12 22:26:51,983 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:26:52,016 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:26:52,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:26:52,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-12 22:26:52,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:26:52,160 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:26:52,161 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:26:52,173 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:26:52,174 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:26:52,174 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-12 22:26:52,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-12 22:26:52,328 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:26:52,340 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:26:52,340 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:26:52,340 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:32 [2021-06-12 22:26:52,750 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:26:52,750 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [940065995] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:26:52,750 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:26:52,750 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-12 22:26:52,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671215384] [2021-06-12 22:26:52,750 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-12 22:26:52,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:26:52,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-12 22:26:52,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1364, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 22:26:52,751 INFO L87 Difference]: Start difference. First operand 7137 states and 21686 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:26:54,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:26:54,856 INFO L93 Difference]: Finished difference Result 8231 states and 24865 transitions. [2021-06-12 22:26:54,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-12 22:26:54,857 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-12 22:26:54,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:26:54,868 INFO L225 Difference]: With dead ends: 8231 [2021-06-12 22:26:54,868 INFO L226 Difference]: Without dead ends: 8191 [2021-06-12 22:26:54,868 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 969 ImplicationChecksByTransitivity, 2107.6ms TimeCoverageRelationStatistics Valid=302, Invalid=3480, Unknown=0, NotChecked=0, Total=3782 [2021-06-12 22:26:54,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8191 states. [2021-06-12 22:26:54,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8191 to 7194. [2021-06-12 22:26:54,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7194 states, 7193 states have (on average 3.033504796329765) internal successors, (21820), 7193 states have internal predecessors, (21820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:26:54,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7194 states to 7194 states and 21820 transitions. [2021-06-12 22:26:54,955 INFO L78 Accepts]: Start accepts. Automaton has 7194 states and 21820 transitions. Word has length 48 [2021-06-12 22:26:54,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:26:54,955 INFO L482 AbstractCegarLoop]: Abstraction has 7194 states and 21820 transitions. [2021-06-12 22:26:54,955 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:26:54,955 INFO L276 IsEmpty]: Start isEmpty. Operand 7194 states and 21820 transitions. [2021-06-12 22:26:54,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-12 22:26:54,962 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:26:54,962 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:26:55,162 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175,173 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:26:55,163 INFO L430 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:26:55,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:26:55,163 INFO L82 PathProgramCache]: Analyzing trace with hash -892335166, now seen corresponding path program 87 times [2021-06-12 22:26:55,163 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:26:55,163 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838458526] [2021-06-12 22:26:55,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:26:55,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:26:55,554 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:26:55,554 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:26:55,554 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838458526] [2021-06-12 22:26:55,554 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1838458526] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:26:55,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1648581252] [2021-06-12 22:26:55,555 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:26:55,587 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 22:26:55,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:26:55,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-12 22:26:55,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:26:55,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:26:55,711 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:26:55,723 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:26:55,723 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:26:55,723 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-12 22:26:55,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-12 22:26:55,889 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:26:55,900 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:26:55,901 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:26:55,901 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:32 [2021-06-12 22:26:56,307 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:26:56,307 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1648581252] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:26:56,307 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:26:56,307 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-12 22:26:56,307 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78071594] [2021-06-12 22:26:56,307 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-12 22:26:56,307 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:26:56,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-12 22:26:56,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1362, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 22:26:56,308 INFO L87 Difference]: Start difference. First operand 7194 states and 21820 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:26:57,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:26:57,920 INFO L93 Difference]: Finished difference Result 9550 states and 28677 transitions. [2021-06-12 22:26:57,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-12 22:26:57,920 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-12 22:26:57,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:26:57,932 INFO L225 Difference]: With dead ends: 9550 [2021-06-12 22:26:57,932 INFO L226 Difference]: Without dead ends: 9511 [2021-06-12 22:26:57,932 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 892 ImplicationChecksByTransitivity, 1807.2ms TimeCoverageRelationStatistics Valid=254, Invalid=3168, Unknown=0, NotChecked=0, Total=3422 [2021-06-12 22:26:57,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9511 states. [2021-06-12 22:26:58,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9511 to 7190. [2021-06-12 22:26:58,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7190 states, 7189 states have (on average 3.0336625399916537) internal successors, (21809), 7189 states have internal predecessors, (21809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:26:58,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7190 states to 7190 states and 21809 transitions. [2021-06-12 22:26:58,030 INFO L78 Accepts]: Start accepts. Automaton has 7190 states and 21809 transitions. Word has length 48 [2021-06-12 22:26:58,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:26:58,030 INFO L482 AbstractCegarLoop]: Abstraction has 7190 states and 21809 transitions. [2021-06-12 22:26:58,030 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:26:58,030 INFO L276 IsEmpty]: Start isEmpty. Operand 7190 states and 21809 transitions. [2021-06-12 22:26:58,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-12 22:26:58,038 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:26:58,038 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:26:58,240 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:26:58,241 INFO L430 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:26:58,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:26:58,241 INFO L82 PathProgramCache]: Analyzing trace with hash -750620026, now seen corresponding path program 88 times [2021-06-12 22:26:58,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:26:58,241 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542675815] [2021-06-12 22:26:58,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:26:58,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:26:58,640 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:26:58,641 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:26:58,641 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542675815] [2021-06-12 22:26:58,641 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542675815] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:26:58,641 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1094709687] [2021-06-12 22:26:58,641 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:26:58,673 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:26:58,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:26:58,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-12 22:26:58,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:26:58,795 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:26:58,796 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:26:58,808 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:26:58,809 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:26:58,809 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-12 22:26:58,996 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-12 22:26:58,997 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:26:59,008 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:26:59,009 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:26:59,009 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:32 [2021-06-12 22:26:59,401 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:26:59,401 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1094709687] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:26:59,401 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:26:59,401 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-12 22:26:59,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593694128] [2021-06-12 22:26:59,401 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-12 22:26:59,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:26:59,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-12 22:26:59,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1362, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 22:26:59,402 INFO L87 Difference]: Start difference. First operand 7190 states and 21809 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:27:01,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:27:01,408 INFO L93 Difference]: Finished difference Result 9573 states and 28667 transitions. [2021-06-12 22:27:01,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-12 22:27:01,409 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-12 22:27:01,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:27:01,421 INFO L225 Difference]: With dead ends: 9573 [2021-06-12 22:27:01,421 INFO L226 Difference]: Without dead ends: 9516 [2021-06-12 22:27:01,421 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 895 ImplicationChecksByTransitivity, 1750.8ms TimeCoverageRelationStatistics Valid=258, Invalid=3164, Unknown=0, NotChecked=0, Total=3422 [2021-06-12 22:27:01,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9516 states. [2021-06-12 22:27:01,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9516 to 7196. [2021-06-12 22:27:01,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7196 states, 7195 states have (on average 3.0329395413481586) internal successors, (21822), 7195 states have internal predecessors, (21822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:27:01,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7196 states to 7196 states and 21822 transitions. [2021-06-12 22:27:01,539 INFO L78 Accepts]: Start accepts. Automaton has 7196 states and 21822 transitions. Word has length 48 [2021-06-12 22:27:01,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:27:01,539 INFO L482 AbstractCegarLoop]: Abstraction has 7196 states and 21822 transitions. [2021-06-12 22:27:01,539 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:27:01,539 INFO L276 IsEmpty]: Start isEmpty. Operand 7196 states and 21822 transitions. [2021-06-12 22:27:01,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-12 22:27:01,546 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:27:01,546 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:27:01,756 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable177 [2021-06-12 22:27:01,756 INFO L430 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:27:01,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:27:01,757 INFO L82 PathProgramCache]: Analyzing trace with hash -2033767486, now seen corresponding path program 89 times [2021-06-12 22:27:01,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:27:01,757 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963419786] [2021-06-12 22:27:01,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:27:01,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:27:02,155 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:27:02,155 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:27:02,155 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963419786] [2021-06-12 22:27:02,155 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963419786] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:27:02,156 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1280872516] [2021-06-12 22:27:02,156 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:27:02,189 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 22:27:02,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:27:02,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-12 22:27:02,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:27:02,314 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:27:02,314 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:27:02,327 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:27:02,327 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:27:02,327 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-12 22:27:02,478 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:27:02,479 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:27:02,490 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:27:02,490 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:27:02,490 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-06-12 22:27:02,883 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:27:02,883 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1280872516] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:27:02,883 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:27:02,883 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-12 22:27:02,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588996846] [2021-06-12 22:27:02,883 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-12 22:27:02,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:27:02,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-12 22:27:02,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1362, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 22:27:02,884 INFO L87 Difference]: Start difference. First operand 7196 states and 21822 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:27:04,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:27:04,959 INFO L93 Difference]: Finished difference Result 9528 states and 28571 transitions. [2021-06-12 22:27:04,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-12 22:27:04,960 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-12 22:27:04,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:27:04,971 INFO L225 Difference]: With dead ends: 9528 [2021-06-12 22:27:04,971 INFO L226 Difference]: Without dead ends: 9434 [2021-06-12 22:27:04,971 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1006 ImplicationChecksByTransitivity, 1929.7ms TimeCoverageRelationStatistics Valid=279, Invalid=3503, Unknown=0, NotChecked=0, Total=3782 [2021-06-12 22:27:04,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9434 states. [2021-06-12 22:27:05,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9434 to 7176. [2021-06-12 22:27:05,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7176 states, 7175 states have (on average 3.0354006968641114) internal successors, (21779), 7175 states have internal predecessors, (21779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:27:05,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7176 states to 7176 states and 21779 transitions. [2021-06-12 22:27:05,068 INFO L78 Accepts]: Start accepts. Automaton has 7176 states and 21779 transitions. Word has length 48 [2021-06-12 22:27:05,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:27:05,068 INFO L482 AbstractCegarLoop]: Abstraction has 7176 states and 21779 transitions. [2021-06-12 22:27:05,068 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:27:05,068 INFO L276 IsEmpty]: Start isEmpty. Operand 7176 states and 21779 transitions. [2021-06-12 22:27:05,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-12 22:27:05,075 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:27:05,075 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:27:05,275 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable178 [2021-06-12 22:27:05,276 INFO L430 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:27:05,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:27:05,276 INFO L82 PathProgramCache]: Analyzing trace with hash -371160676, now seen corresponding path program 90 times [2021-06-12 22:27:05,276 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:27:05,276 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742561092] [2021-06-12 22:27:05,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:27:05,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:27:05,668 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:27:05,668 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:27:05,668 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742561092] [2021-06-12 22:27:05,669 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742561092] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:27:05,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [95320828] [2021-06-12 22:27:05,669 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:27:05,702 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 22:27:05,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:27:05,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-12 22:27:05,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:27:05,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:27:05,824 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:27:05,836 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:27:05,837 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:27:05,837 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-12 22:27:05,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:27:05,988 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:27:05,998 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:27:05,999 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:27:05,999 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-06-12 22:27:06,418 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:27:06,418 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [95320828] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:27:06,418 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:27:06,418 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-12 22:27:06,418 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805594078] [2021-06-12 22:27:06,418 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-12 22:27:06,418 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:27:06,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-12 22:27:06,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1362, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 22:27:06,419 INFO L87 Difference]: Start difference. First operand 7176 states and 21779 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:27:08,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:27:08,412 INFO L93 Difference]: Finished difference Result 9664 states and 28906 transitions. [2021-06-12 22:27:08,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-12 22:27:08,412 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-12 22:27:08,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:27:08,423 INFO L225 Difference]: With dead ends: 9664 [2021-06-12 22:27:08,424 INFO L226 Difference]: Without dead ends: 9520 [2021-06-12 22:27:08,424 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 968 ImplicationChecksByTransitivity, 1878.4ms TimeCoverageRelationStatistics Valid=273, Invalid=3387, Unknown=0, NotChecked=0, Total=3660 [2021-06-12 22:27:08,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9520 states. [2021-06-12 22:27:08,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9520 to 7236. [2021-06-12 22:27:08,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7236 states, 7235 states have (on average 3.029025570145128) internal successors, (21915), 7235 states have internal predecessors, (21915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:27:08,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7236 states to 7236 states and 21915 transitions. [2021-06-12 22:27:08,521 INFO L78 Accepts]: Start accepts. Automaton has 7236 states and 21915 transitions. Word has length 48 [2021-06-12 22:27:08,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:27:08,521 INFO L482 AbstractCegarLoop]: Abstraction has 7236 states and 21915 transitions. [2021-06-12 22:27:08,521 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:27:08,521 INFO L276 IsEmpty]: Start isEmpty. Operand 7236 states and 21915 transitions. [2021-06-12 22:27:08,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-12 22:27:08,529 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:27:08,530 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:27:08,731 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 177 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2021-06-12 22:27:08,731 INFO L430 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:27:08,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:27:08,731 INFO L82 PathProgramCache]: Analyzing trace with hash -345091800, now seen corresponding path program 91 times [2021-06-12 22:27:08,731 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:27:08,731 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570956010] [2021-06-12 22:27:08,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:27:08,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:27:09,176 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:27:09,176 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:27:09,176 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570956010] [2021-06-12 22:27:09,176 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1570956010] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:27:09,176 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [588518292] [2021-06-12 22:27:09,176 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:27:09,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:27:09,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-12 22:27:09,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:27:09,331 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:27:09,332 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:27:09,344 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:27:09,345 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:27:09,345 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-12 22:27:09,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-12 22:27:09,499 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:27:09,510 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:27:09,510 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:27:09,510 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:32 [2021-06-12 22:27:09,917 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:27:09,917 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [588518292] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:27:09,917 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:27:09,917 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-12 22:27:09,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608979897] [2021-06-12 22:27:09,917 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-12 22:27:09,917 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:27:09,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-12 22:27:09,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1364, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 22:27:09,918 INFO L87 Difference]: Start difference. First operand 7236 states and 21915 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:27:12,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:27:12,166 INFO L93 Difference]: Finished difference Result 8355 states and 25148 transitions. [2021-06-12 22:27:12,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-12 22:27:12,166 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-12 22:27:12,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:27:12,177 INFO L225 Difference]: With dead ends: 8355 [2021-06-12 22:27:12,177 INFO L226 Difference]: Without dead ends: 8315 [2021-06-12 22:27:12,177 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 969 ImplicationChecksByTransitivity, 2120.1ms TimeCoverageRelationStatistics Valid=302, Invalid=3480, Unknown=0, NotChecked=0, Total=3782 [2021-06-12 22:27:12,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8315 states. [2021-06-12 22:27:12,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8315 to 7314. [2021-06-12 22:27:12,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7314 states, 7313 states have (on average 3.021468617530425) internal successors, (22096), 7313 states have internal predecessors, (22096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:27:12,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7314 states to 7314 states and 22096 transitions. [2021-06-12 22:27:12,265 INFO L78 Accepts]: Start accepts. Automaton has 7314 states and 22096 transitions. Word has length 48 [2021-06-12 22:27:12,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:27:12,266 INFO L482 AbstractCegarLoop]: Abstraction has 7314 states and 22096 transitions. [2021-06-12 22:27:12,266 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:27:12,266 INFO L276 IsEmpty]: Start isEmpty. Operand 7314 states and 22096 transitions. [2021-06-12 22:27:12,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-12 22:27:12,273 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:27:12,273 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:27:12,473 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable180 [2021-06-12 22:27:12,473 INFO L430 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:27:12,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:27:12,474 INFO L82 PathProgramCache]: Analyzing trace with hash -573850644, now seen corresponding path program 92 times [2021-06-12 22:27:12,474 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:27:12,474 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525043590] [2021-06-12 22:27:12,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:27:12,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:27:12,869 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:27:12,869 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:27:12,869 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525043590] [2021-06-12 22:27:12,869 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [525043590] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:27:12,869 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [791793442] [2021-06-12 22:27:12,869 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:27:12,900 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:27:12,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:27:12,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-12 22:27:12,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:27:13,023 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:27:13,024 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:27:13,036 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:27:13,037 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:27:13,037 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-12 22:27:13,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-12 22:27:13,189 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:27:13,199 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:27:13,200 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:27:13,200 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:32 [2021-06-12 22:27:13,600 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:27:13,600 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [791793442] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:27:13,600 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:27:13,600 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-12 22:27:13,600 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705076112] [2021-06-12 22:27:13,601 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-12 22:27:13,601 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:27:13,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-12 22:27:13,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1362, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 22:27:13,601 INFO L87 Difference]: Start difference. First operand 7314 states and 22096 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:27:15,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:27:15,431 INFO L93 Difference]: Finished difference Result 9672 states and 28955 transitions. [2021-06-12 22:27:15,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-12 22:27:15,432 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-12 22:27:15,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:27:15,443 INFO L225 Difference]: With dead ends: 9672 [2021-06-12 22:27:15,443 INFO L226 Difference]: Without dead ends: 9627 [2021-06-12 22:27:15,443 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 928 ImplicationChecksByTransitivity, 1822.9ms TimeCoverageRelationStatistics Valid=264, Invalid=3276, Unknown=0, NotChecked=0, Total=3540 [2021-06-12 22:27:15,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9627 states. [2021-06-12 22:27:15,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9627 to 7308. [2021-06-12 22:27:15,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7308 states, 7307 states have (on average 3.0213493909949363) internal successors, (22077), 7307 states have internal predecessors, (22077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:27:15,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7308 states to 7308 states and 22077 transitions. [2021-06-12 22:27:15,538 INFO L78 Accepts]: Start accepts. Automaton has 7308 states and 22077 transitions. Word has length 48 [2021-06-12 22:27:15,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:27:15,538 INFO L482 AbstractCegarLoop]: Abstraction has 7308 states and 22077 transitions. [2021-06-12 22:27:15,538 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:27:15,538 INFO L276 IsEmpty]: Start isEmpty. Operand 7308 states and 22077 transitions. [2021-06-12 22:27:15,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-12 22:27:15,545 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:27:15,545 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:27:15,749 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181,179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:27:15,749 INFO L430 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:27:15,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:27:15,750 INFO L82 PathProgramCache]: Analyzing trace with hash -1520582444, now seen corresponding path program 93 times [2021-06-12 22:27:15,750 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:27:15,750 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857387269] [2021-06-12 22:27:15,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:27:15,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:27:16,147 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:27:16,147 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:27:16,147 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857387269] [2021-06-12 22:27:16,147 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1857387269] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:27:16,147 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1197474777] [2021-06-12 22:27:16,147 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:27:16,181 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 22:27:16,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:27:16,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-12 22:27:16,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:27:16,344 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:27:16,345 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:27:16,357 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:27:16,358 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:27:16,358 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-12 22:27:16,518 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-12 22:27:16,519 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:27:16,530 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:27:16,531 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:27:16,531 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:32 [2021-06-12 22:27:16,917 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:27:16,917 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1197474777] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:27:16,917 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:27:16,917 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-12 22:27:16,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163693398] [2021-06-12 22:27:16,917 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-12 22:27:16,917 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:27:16,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-12 22:27:16,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1362, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 22:27:16,918 INFO L87 Difference]: Start difference. First operand 7308 states and 22077 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:27:18,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:27:18,643 INFO L93 Difference]: Finished difference Result 9741 states and 29036 transitions. [2021-06-12 22:27:18,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-12 22:27:18,644 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-12 22:27:18,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:27:18,656 INFO L225 Difference]: With dead ends: 9741 [2021-06-12 22:27:18,657 INFO L226 Difference]: Without dead ends: 9682 [2021-06-12 22:27:18,657 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 861 ImplicationChecksByTransitivity, 1767.6ms TimeCoverageRelationStatistics Valid=248, Invalid=3058, Unknown=0, NotChecked=0, Total=3306 [2021-06-12 22:27:18,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9682 states. [2021-06-12 22:27:18,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9682 to 7314. [2021-06-12 22:27:18,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7314 states, 7313 states have (on average 3.0206481608095173) internal successors, (22090), 7313 states have internal predecessors, (22090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:27:18,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7314 states to 7314 states and 22090 transitions. [2021-06-12 22:27:18,777 INFO L78 Accepts]: Start accepts. Automaton has 7314 states and 22090 transitions. Word has length 48 [2021-06-12 22:27:18,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:27:18,777 INFO L482 AbstractCegarLoop]: Abstraction has 7314 states and 22090 transitions. [2021-06-12 22:27:18,777 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:27:18,777 INFO L276 IsEmpty]: Start isEmpty. Operand 7314 states and 22090 transitions. [2021-06-12 22:27:18,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-12 22:27:18,784 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:27:18,784 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:27:18,984 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable182,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:27:18,984 INFO L430 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:27:18,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:27:18,985 INFO L82 PathProgramCache]: Analyzing trace with hash -1675019962, now seen corresponding path program 94 times [2021-06-12 22:27:18,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:27:18,985 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372155286] [2021-06-12 22:27:18,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:27:18,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:27:19,379 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:27:19,379 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:27:19,379 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372155286] [2021-06-12 22:27:19,379 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [372155286] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:27:19,379 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1922287408] [2021-06-12 22:27:19,379 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:27:19,410 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:27:19,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:27:19,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-12 22:27:19,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:27:19,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:27:19,534 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:27:19,546 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:27:19,547 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:27:19,547 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-12 22:27:19,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-12 22:27:19,711 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:27:19,725 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:27:19,726 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:27:19,726 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:32 [2021-06-12 22:27:20,135 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:27:20,135 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1922287408] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:27:20,135 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:27:20,135 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-12 22:27:20,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305053999] [2021-06-12 22:27:20,135 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-12 22:27:20,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:27:20,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-12 22:27:20,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1362, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 22:27:20,136 INFO L87 Difference]: Start difference. First operand 7314 states and 22090 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:27:22,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:27:22,017 INFO L93 Difference]: Finished difference Result 9686 states and 28917 transitions. [2021-06-12 22:27:22,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-12 22:27:22,017 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-12 22:27:22,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:27:22,029 INFO L225 Difference]: With dead ends: 9686 [2021-06-12 22:27:22,029 INFO L226 Difference]: Without dead ends: 9530 [2021-06-12 22:27:22,030 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1006 ImplicationChecksByTransitivity, 1951.9ms TimeCoverageRelationStatistics Valid=279, Invalid=3503, Unknown=0, NotChecked=0, Total=3782 [2021-06-12 22:27:22,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9530 states. [2021-06-12 22:27:22,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9530 to 7248. [2021-06-12 22:27:22,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7248 states, 7247 states have (on average 3.024837863943701) internal successors, (21921), 7247 states have internal predecessors, (21921), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:27:22,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7248 states to 7248 states and 21921 transitions. [2021-06-12 22:27:22,131 INFO L78 Accepts]: Start accepts. Automaton has 7248 states and 21921 transitions. Word has length 48 [2021-06-12 22:27:22,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:27:22,131 INFO L482 AbstractCegarLoop]: Abstraction has 7248 states and 21921 transitions. [2021-06-12 22:27:22,131 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:27:22,131 INFO L276 IsEmpty]: Start isEmpty. Operand 7248 states and 21921 transitions. [2021-06-12 22:27:22,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-12 22:27:22,140 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:27:22,140 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:27:22,344 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183,181 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:27:22,344 INFO L430 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:27:22,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:27:22,345 INFO L82 PathProgramCache]: Analyzing trace with hash 1096559964, now seen corresponding path program 95 times [2021-06-12 22:27:22,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:27:22,345 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618201357] [2021-06-12 22:27:22,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:27:22,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:27:22,772 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:27:22,772 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:27:22,772 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618201357] [2021-06-12 22:27:22,773 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [618201357] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:27:22,773 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2053445442] [2021-06-12 22:27:22,773 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:27:22,804 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 22:27:22,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:27:22,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-12 22:27:22,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:27:22,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:27:22,928 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:27:22,940 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:27:22,940 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:27:22,940 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-12 22:27:23,092 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:27:23,093 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:27:23,104 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:27:23,105 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:27:23,105 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-06-12 22:27:23,553 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:27:23,553 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2053445442] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:27:23,553 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:27:23,553 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-12 22:27:23,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666883306] [2021-06-12 22:27:23,553 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-12 22:27:23,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:27:23,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-12 22:27:23,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1364, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 22:27:23,554 INFO L87 Difference]: Start difference. First operand 7248 states and 21921 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:27:25,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:27:25,952 INFO L93 Difference]: Finished difference Result 8297 states and 24995 transitions. [2021-06-12 22:27:25,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-12 22:27:25,952 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-12 22:27:25,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:27:25,962 INFO L225 Difference]: With dead ends: 8297 [2021-06-12 22:27:25,962 INFO L226 Difference]: Without dead ends: 8257 [2021-06-12 22:27:25,962 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 913 ImplicationChecksByTransitivity, 2100.5ms TimeCoverageRelationStatistics Valid=314, Invalid=3346, Unknown=0, NotChecked=0, Total=3660 [2021-06-12 22:27:25,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8257 states. [2021-06-12 22:27:26,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8257 to 7256. [2021-06-12 22:27:26,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7256 states, 7255 states have (on average 3.024121295658167) internal successors, (21940), 7255 states have internal predecessors, (21940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:27:26,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7256 states to 7256 states and 21940 transitions. [2021-06-12 22:27:26,068 INFO L78 Accepts]: Start accepts. Automaton has 7256 states and 21940 transitions. Word has length 48 [2021-06-12 22:27:26,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:27:26,068 INFO L482 AbstractCegarLoop]: Abstraction has 7256 states and 21940 transitions. [2021-06-12 22:27:26,068 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:27:26,069 INFO L276 IsEmpty]: Start isEmpty. Operand 7256 states and 21940 transitions. [2021-06-12 22:27:26,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-12 22:27:26,075 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:27:26,075 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:27:26,276 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:27:26,276 INFO L430 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:27:26,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:27:26,276 INFO L82 PathProgramCache]: Analyzing trace with hash 220377500, now seen corresponding path program 96 times [2021-06-12 22:27:26,276 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:27:26,276 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926684899] [2021-06-12 22:27:26,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:27:26,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:27:26,671 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:27:26,671 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:27:26,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926684899] [2021-06-12 22:27:26,671 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926684899] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:27:26,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [551036493] [2021-06-12 22:27:26,671 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:27:26,703 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 22:27:26,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:27:26,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-12 22:27:26,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:27:26,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:27:26,827 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:27:26,839 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:27:26,840 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:27:26,840 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-12 22:27:26,991 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:27:26,992 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:27:27,003 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:27:27,004 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:27:27,004 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-06-12 22:27:27,417 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:27:27,418 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [551036493] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:27:27,418 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:27:27,418 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-12 22:27:27,418 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770456037] [2021-06-12 22:27:27,418 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-12 22:27:27,418 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:27:27,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-12 22:27:27,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1364, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 22:27:27,418 INFO L87 Difference]: Start difference. First operand 7256 states and 21940 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:27:29,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:27:29,452 INFO L93 Difference]: Finished difference Result 8263 states and 24926 transitions. [2021-06-12 22:27:29,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-12 22:27:29,452 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-12 22:27:29,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:27:29,462 INFO L225 Difference]: With dead ends: 8263 [2021-06-12 22:27:29,462 INFO L226 Difference]: Without dead ends: 8224 [2021-06-12 22:27:29,462 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 894 ImplicationChecksByTransitivity, 1987.7ms TimeCoverageRelationStatistics Valid=289, Invalid=3251, Unknown=0, NotChecked=0, Total=3540 [2021-06-12 22:27:29,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8224 states. [2021-06-12 22:27:29,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8224 to 7252. [2021-06-12 22:27:29,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7252 states, 7251 states have (on average 3.02468625017239) internal successors, (21932), 7251 states have internal predecessors, (21932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:27:29,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7252 states to 7252 states and 21932 transitions. [2021-06-12 22:27:29,551 INFO L78 Accepts]: Start accepts. Automaton has 7252 states and 21932 transitions. Word has length 48 [2021-06-12 22:27:29,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:27:29,551 INFO L482 AbstractCegarLoop]: Abstraction has 7252 states and 21932 transitions. [2021-06-12 22:27:29,551 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:27:29,551 INFO L276 IsEmpty]: Start isEmpty. Operand 7252 states and 21932 transitions. [2021-06-12 22:27:29,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-12 22:27:29,558 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:27:29,558 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:27:29,759 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,183 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:27:29,759 INFO L430 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:27:29,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:27:29,759 INFO L82 PathProgramCache]: Analyzing trace with hash 1464424860, now seen corresponding path program 97 times [2021-06-12 22:27:29,759 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:27:29,759 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163347193] [2021-06-12 22:27:29,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:27:29,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:27:30,164 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:27:30,164 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:27:30,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163347193] [2021-06-12 22:27:30,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163347193] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:27:30,165 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [591774870] [2021-06-12 22:27:30,165 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:27:30,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:27:30,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-12 22:27:30,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:27:30,319 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:27:30,320 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:27:30,332 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:27:30,332 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:27:30,332 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-12 22:27:30,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-12 22:27:30,484 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:27:30,495 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:27:30,495 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:27:30,495 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:32 [2021-06-12 22:27:30,908 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:27:30,909 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [591774870] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:27:30,909 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:27:30,909 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-12 22:27:30,909 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653729849] [2021-06-12 22:27:30,909 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-12 22:27:30,909 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:27:30,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-12 22:27:30,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1364, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 22:27:30,910 INFO L87 Difference]: Start difference. First operand 7252 states and 21932 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:27:33,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:27:33,175 INFO L93 Difference]: Finished difference Result 8303 states and 25007 transitions. [2021-06-12 22:27:33,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-12 22:27:33,175 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-12 22:27:33,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:27:33,187 INFO L225 Difference]: With dead ends: 8303 [2021-06-12 22:27:33,187 INFO L226 Difference]: Without dead ends: 8263 [2021-06-12 22:27:33,187 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 913 ImplicationChecksByTransitivity, 2109.9ms TimeCoverageRelationStatistics Valid=314, Invalid=3346, Unknown=0, NotChecked=0, Total=3660 [2021-06-12 22:27:33,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8263 states. [2021-06-12 22:27:33,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8263 to 7258. [2021-06-12 22:27:33,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7258 states, 7257 states have (on average 3.023976849937991) internal successors, (21945), 7257 states have internal predecessors, (21945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:27:33,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7258 states to 7258 states and 21945 transitions. [2021-06-12 22:27:33,269 INFO L78 Accepts]: Start accepts. Automaton has 7258 states and 21945 transitions. Word has length 48 [2021-06-12 22:27:33,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:27:33,269 INFO L482 AbstractCegarLoop]: Abstraction has 7258 states and 21945 transitions. [2021-06-12 22:27:33,269 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:27:33,269 INFO L276 IsEmpty]: Start isEmpty. Operand 7258 states and 21945 transitions. [2021-06-12 22:27:33,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-12 22:27:33,276 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:27:33,276 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:27:33,476 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186,184 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:27:33,477 INFO L430 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:27:33,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:27:33,477 INFO L82 PathProgramCache]: Analyzing trace with hash -1066872506, now seen corresponding path program 98 times [2021-06-12 22:27:33,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:27:33,477 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526846171] [2021-06-12 22:27:33,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:27:33,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:27:33,909 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:27:33,909 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:27:33,909 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526846171] [2021-06-12 22:27:33,909 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [526846171] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:27:33,909 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [958071760] [2021-06-12 22:27:33,909 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:27:33,941 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:27:33,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:27:33,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-12 22:27:33,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:27:34,066 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:27:34,067 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:27:34,079 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:27:34,079 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:27:34,079 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-12 22:27:34,231 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-12 22:27:34,232 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:27:34,243 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:27:34,244 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:27:34,244 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:32 [2021-06-12 22:27:34,649 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:27:34,649 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [958071760] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:27:34,650 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:27:34,650 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-12 22:27:34,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982621727] [2021-06-12 22:27:34,650 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-12 22:27:34,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:27:34,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-12 22:27:34,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1364, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 22:27:34,650 INFO L87 Difference]: Start difference. First operand 7258 states and 21945 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:27:36,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:27:36,664 INFO L93 Difference]: Finished difference Result 8273 states and 24947 transitions. [2021-06-12 22:27:36,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-12 22:27:36,664 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-12 22:27:36,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:27:36,674 INFO L225 Difference]: With dead ends: 8273 [2021-06-12 22:27:36,674 INFO L226 Difference]: Without dead ends: 8228 [2021-06-12 22:27:36,674 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 894 ImplicationChecksByTransitivity, 1961.9ms TimeCoverageRelationStatistics Valid=289, Invalid=3251, Unknown=0, NotChecked=0, Total=3540 [2021-06-12 22:27:36,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8228 states. [2021-06-12 22:27:36,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8228 to 7252. [2021-06-12 22:27:36,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7252 states, 7251 states have (on average 3.0244104261481173) internal successors, (21930), 7251 states have internal predecessors, (21930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:27:36,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7252 states to 7252 states and 21930 transitions. [2021-06-12 22:27:36,757 INFO L78 Accepts]: Start accepts. Automaton has 7252 states and 21930 transitions. Word has length 48 [2021-06-12 22:27:36,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:27:36,757 INFO L482 AbstractCegarLoop]: Abstraction has 7252 states and 21930 transitions. [2021-06-12 22:27:36,757 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:27:36,757 INFO L276 IsEmpty]: Start isEmpty. Operand 7252 states and 21930 transitions. [2021-06-12 22:27:36,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-12 22:27:36,764 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:27:36,764 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:27:36,964 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable187 [2021-06-12 22:27:36,965 INFO L430 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:27:36,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:27:36,965 INFO L82 PathProgramCache]: Analyzing trace with hash -1006576164, now seen corresponding path program 99 times [2021-06-12 22:27:36,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:27:36,965 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470537030] [2021-06-12 22:27:36,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:27:36,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:27:37,456 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:27:37,456 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:27:37,456 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470537030] [2021-06-12 22:27:37,456 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470537030] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:27:37,456 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [136307083] [2021-06-12 22:27:37,456 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:27:37,503 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 22:27:37,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:27:37,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-12 22:27:37,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:27:37,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:27:37,644 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:27:37,657 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:27:37,657 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:27:37,657 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-12 22:27:37,884 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-12 22:27:37,885 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:27:37,896 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:27:37,896 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:27:37,896 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:32 [2021-06-12 22:27:38,300 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:27:38,300 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [136307083] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:27:38,300 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:27:38,300 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22] total 40 [2021-06-12 22:27:38,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675950249] [2021-06-12 22:27:38,301 INFO L462 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-06-12 22:27:38,301 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:27:38,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-06-12 22:27:38,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=1510, Unknown=0, NotChecked=0, Total=1640 [2021-06-12 22:27:38,301 INFO L87 Difference]: Start difference. First operand 7252 states and 21930 transitions. Second operand has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:27:40,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:27:40,271 INFO L93 Difference]: Finished difference Result 9610 states and 28791 transitions. [2021-06-12 22:27:40,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-12 22:27:40,271 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-12 22:27:40,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:27:40,283 INFO L225 Difference]: With dead ends: 9610 [2021-06-12 22:27:40,283 INFO L226 Difference]: Without dead ends: 9575 [2021-06-12 22:27:40,283 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 996 ImplicationChecksByTransitivity, 1945.1ms TimeCoverageRelationStatistics Valid=276, Invalid=3384, Unknown=0, NotChecked=0, Total=3660 [2021-06-12 22:27:40,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9575 states. [2021-06-12 22:27:40,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9575 to 7256. [2021-06-12 22:27:40,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7256 states, 7255 states have (on average 3.0238456237077878) internal successors, (21938), 7255 states have internal predecessors, (21938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:27:40,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7256 states to 7256 states and 21938 transitions. [2021-06-12 22:27:40,377 INFO L78 Accepts]: Start accepts. Automaton has 7256 states and 21938 transitions. Word has length 48 [2021-06-12 22:27:40,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:27:40,377 INFO L482 AbstractCegarLoop]: Abstraction has 7256 states and 21938 transitions. [2021-06-12 22:27:40,377 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:27:40,377 INFO L276 IsEmpty]: Start isEmpty. Operand 7256 states and 21938 transitions. [2021-06-12 22:27:40,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-12 22:27:40,383 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:27:40,384 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:27:40,584 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 186 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable188 [2021-06-12 22:27:40,584 INFO L430 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:27:40,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:27:40,584 INFO L82 PathProgramCache]: Analyzing trace with hash -1614013924, now seen corresponding path program 100 times [2021-06-12 22:27:40,584 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:27:40,584 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120811865] [2021-06-12 22:27:40,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:27:40,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:27:40,973 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:27:40,973 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:27:40,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120811865] [2021-06-12 22:27:40,973 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2120811865] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:27:40,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [847182298] [2021-06-12 22:27:40,974 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:27:41,005 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:27:41,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:27:41,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-12 22:27:41,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:27:41,164 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:27:41,165 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:27:41,177 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:27:41,178 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:27:41,178 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-12 22:27:41,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-12 22:27:41,330 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:27:41,342 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:27:41,342 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:27:41,342 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:32 [2021-06-12 22:27:41,741 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:27:41,741 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [847182298] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:27:41,741 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:27:41,741 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-12 22:27:41,741 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850247759] [2021-06-12 22:27:41,742 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-12 22:27:41,742 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:27:41,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-12 22:27:41,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1362, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 22:27:41,742 INFO L87 Difference]: Start difference. First operand 7256 states and 21938 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:27:43,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:27:43,537 INFO L93 Difference]: Finished difference Result 9614 states and 28797 transitions. [2021-06-12 22:27:43,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-12 22:27:43,537 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-12 22:27:43,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:27:43,548 INFO L225 Difference]: With dead ends: 9614 [2021-06-12 22:27:43,548 INFO L226 Difference]: Without dead ends: 9569 [2021-06-12 22:27:43,549 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 891 ImplicationChecksByTransitivity, 1803.1ms TimeCoverageRelationStatistics Valid=260, Invalid=3162, Unknown=0, NotChecked=0, Total=3422 [2021-06-12 22:27:43,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9569 states. [2021-06-12 22:27:43,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9569 to 7250. [2021-06-12 22:27:43,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7250 states, 7249 states have (on average 3.0245551110498) internal successors, (21925), 7249 states have internal predecessors, (21925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:27:43,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7250 states to 7250 states and 21925 transitions. [2021-06-12 22:27:43,663 INFO L78 Accepts]: Start accepts. Automaton has 7250 states and 21925 transitions. Word has length 48 [2021-06-12 22:27:43,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:27:43,664 INFO L482 AbstractCegarLoop]: Abstraction has 7250 states and 21925 transitions. [2021-06-12 22:27:43,664 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:27:43,664 INFO L276 IsEmpty]: Start isEmpty. Operand 7250 states and 21925 transitions. [2021-06-12 22:27:43,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-12 22:27:43,671 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:27:43,671 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:27:43,871 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 187 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable189 [2021-06-12 22:27:43,871 INFO L430 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:27:43,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:27:43,872 INFO L82 PathProgramCache]: Analyzing trace with hash -1076851152, now seen corresponding path program 101 times [2021-06-12 22:27:43,872 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:27:43,872 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129474236] [2021-06-12 22:27:43,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:27:43,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:27:44,292 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:27:44,292 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:27:44,293 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129474236] [2021-06-12 22:27:44,293 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129474236] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:27:44,293 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1018861522] [2021-06-12 22:27:44,293 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:27:44,325 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 22:27:44,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:27:44,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-12 22:27:44,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:27:44,449 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:27:44,450 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:27:44,462 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:27:44,462 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:27:44,462 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-12 22:27:44,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:27:44,619 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:27:44,630 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:27:44,631 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:27:44,631 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-06-12 22:27:45,040 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:27:45,040 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1018861522] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:27:45,040 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:27:45,040 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-12 22:27:45,040 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111542571] [2021-06-12 22:27:45,041 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-12 22:27:45,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:27:45,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-12 22:27:45,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1364, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 22:27:45,041 INFO L87 Difference]: Start difference. First operand 7250 states and 21925 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:27:47,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:27:47,381 INFO L93 Difference]: Finished difference Result 8308 states and 25019 transitions. [2021-06-12 22:27:47,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-12 22:27:47,381 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-12 22:27:47,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:27:47,391 INFO L225 Difference]: With dead ends: 8308 [2021-06-12 22:27:47,391 INFO L226 Difference]: Without dead ends: 8255 [2021-06-12 22:27:47,392 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 967 ImplicationChecksByTransitivity, 2037.3ms TimeCoverageRelationStatistics Valid=308, Invalid=3474, Unknown=0, NotChecked=0, Total=3782 [2021-06-12 22:27:47,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8255 states. [2021-06-12 22:27:47,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8255 to 7258. [2021-06-12 22:27:47,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7258 states, 7257 states have (on average 3.0231500620090945) internal successors, (21939), 7257 states have internal predecessors, (21939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:27:47,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7258 states to 7258 states and 21939 transitions. [2021-06-12 22:27:47,475 INFO L78 Accepts]: Start accepts. Automaton has 7258 states and 21939 transitions. Word has length 48 [2021-06-12 22:27:47,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:27:47,475 INFO L482 AbstractCegarLoop]: Abstraction has 7258 states and 21939 transitions. [2021-06-12 22:27:47,475 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:27:47,475 INFO L276 IsEmpty]: Start isEmpty. Operand 7258 states and 21939 transitions. [2021-06-12 22:27:47,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-12 22:27:47,482 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:27:47,482 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:27:47,683 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 188 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable190 [2021-06-12 22:27:47,683 INFO L430 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:27:47,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:27:47,683 INFO L82 PathProgramCache]: Analyzing trace with hash -1953033616, now seen corresponding path program 102 times [2021-06-12 22:27:47,684 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:27:47,684 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107405215] [2021-06-12 22:27:47,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:27:47,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:27:48,084 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:27:48,084 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:27:48,084 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107405215] [2021-06-12 22:27:48,084 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1107405215] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:27:48,084 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [764330030] [2021-06-12 22:27:48,084 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:27:48,117 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 22:27:48,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:27:48,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-12 22:27:48,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:27:48,240 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:27:48,241 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:27:48,253 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:27:48,254 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:27:48,254 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-12 22:27:48,406 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:27:48,407 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:27:48,418 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:27:48,418 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:27:48,418 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-06-12 22:27:48,859 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:27:48,859 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [764330030] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:27:48,859 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:27:48,859 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-12 22:27:48,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364677856] [2021-06-12 22:27:48,859 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-12 22:27:48,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:27:48,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-12 22:27:48,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1362, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 22:27:48,860 INFO L87 Difference]: Start difference. First operand 7258 states and 21939 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:27:50,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:27:50,499 INFO L93 Difference]: Finished difference Result 9612 states and 28790 transitions. [2021-06-12 22:27:50,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-12 22:27:50,499 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-12 22:27:50,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:27:50,511 INFO L225 Difference]: With dead ends: 9612 [2021-06-12 22:27:50,511 INFO L226 Difference]: Without dead ends: 9569 [2021-06-12 22:27:50,512 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 929 ImplicationChecksByTransitivity, 1782.1ms TimeCoverageRelationStatistics Valid=266, Invalid=3274, Unknown=0, NotChecked=0, Total=3540 [2021-06-12 22:27:50,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9569 states. [2021-06-12 22:27:50,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9569 to 7250. [2021-06-12 22:27:50,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7250 states, 7249 states have (on average 3.0244171609877224) internal successors, (21924), 7249 states have internal predecessors, (21924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:27:50,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7250 states to 7250 states and 21924 transitions. [2021-06-12 22:27:50,626 INFO L78 Accepts]: Start accepts. Automaton has 7250 states and 21924 transitions. Word has length 48 [2021-06-12 22:27:50,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:27:50,626 INFO L482 AbstractCegarLoop]: Abstraction has 7250 states and 21924 transitions. [2021-06-12 22:27:50,626 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:27:50,626 INFO L276 IsEmpty]: Start isEmpty. Operand 7250 states and 21924 transitions. [2021-06-12 22:27:50,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-12 22:27:50,634 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:27:50,635 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:27:50,836 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:27:50,837 INFO L430 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:27:50,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:27:50,837 INFO L82 PathProgramCache]: Analyzing trace with hash 1062019744, now seen corresponding path program 103 times [2021-06-12 22:27:50,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:27:50,837 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800419958] [2021-06-12 22:27:50,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:27:50,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:27:51,274 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:27:51,274 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:27:51,274 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800419958] [2021-06-12 22:27:51,274 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800419958] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:27:51,275 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1922337068] [2021-06-12 22:27:51,275 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:27:51,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:27:51,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-12 22:27:51,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:27:51,430 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:27:51,431 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:27:51,443 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:27:51,444 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:27:51,444 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-12 22:27:51,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-12 22:27:51,598 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:27:51,609 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:27:51,609 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:27:51,609 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:32 [2021-06-12 22:27:52,047 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:27:52,047 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1922337068] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:27:52,047 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:27:52,047 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-12 22:27:52,047 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428898252] [2021-06-12 22:27:52,047 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-12 22:27:52,048 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:27:52,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-12 22:27:52,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1364, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 22:27:52,048 INFO L87 Difference]: Start difference. First operand 7250 states and 21924 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:27:54,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:27:54,306 INFO L93 Difference]: Finished difference Result 8316 states and 25036 transitions. [2021-06-12 22:27:54,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-12 22:27:54,307 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-12 22:27:54,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:27:54,317 INFO L225 Difference]: With dead ends: 8316 [2021-06-12 22:27:54,317 INFO L226 Difference]: Without dead ends: 8263 [2021-06-12 22:27:54,317 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 967 ImplicationChecksByTransitivity, 2169.5ms TimeCoverageRelationStatistics Valid=308, Invalid=3474, Unknown=0, NotChecked=0, Total=3782 [2021-06-12 22:27:54,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8263 states. [2021-06-12 22:27:54,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8263 to 7262. [2021-06-12 22:27:54,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7262 states, 7261 states have (on average 3.0229995868337696) internal successors, (21950), 7261 states have internal predecessors, (21950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:27:54,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7262 states to 7262 states and 21950 transitions. [2021-06-12 22:27:54,398 INFO L78 Accepts]: Start accepts. Automaton has 7262 states and 21950 transitions. Word has length 48 [2021-06-12 22:27:54,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:27:54,398 INFO L482 AbstractCegarLoop]: Abstraction has 7262 states and 21950 transitions. [2021-06-12 22:27:54,398 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:27:54,398 INFO L276 IsEmpty]: Start isEmpty. Operand 7262 states and 21950 transitions. [2021-06-12 22:27:54,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-12 22:27:54,405 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:27:54,405 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:27:54,605 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable192 [2021-06-12 22:27:54,605 INFO L430 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:27:54,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:27:54,606 INFO L82 PathProgramCache]: Analyzing trace with hash -1469277622, now seen corresponding path program 104 times [2021-06-12 22:27:54,606 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:27:54,606 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059025473] [2021-06-12 22:27:54,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:27:54,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:27:55,008 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:27:55,009 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:27:55,009 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059025473] [2021-06-12 22:27:55,009 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1059025473] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:27:55,014 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1660577367] [2021-06-12 22:27:55,015 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:27:55,063 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:27:55,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:27:55,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-12 22:27:55,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:27:55,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:27:55,197 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:27:55,209 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:27:55,209 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:27:55,210 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-12 22:27:55,362 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-12 22:27:55,363 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:27:55,374 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:27:55,375 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:27:55,375 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:32 [2021-06-12 22:27:55,773 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:27:55,774 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1660577367] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:27:55,774 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:27:55,774 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-12 22:27:55,774 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830362702] [2021-06-12 22:27:55,774 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-12 22:27:55,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:27:55,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-12 22:27:55,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1362, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 22:27:55,775 INFO L87 Difference]: Start difference. First operand 7262 states and 21950 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:27:57,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:27:57,368 INFO L93 Difference]: Finished difference Result 9620 states and 28809 transitions. [2021-06-12 22:27:57,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-12 22:27:57,369 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-12 22:27:57,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:27:57,381 INFO L225 Difference]: With dead ends: 9620 [2021-06-12 22:27:57,381 INFO L226 Difference]: Without dead ends: 9567 [2021-06-12 22:27:57,381 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 929 ImplicationChecksByTransitivity, 1807.1ms TimeCoverageRelationStatistics Valid=266, Invalid=3274, Unknown=0, NotChecked=0, Total=3540 [2021-06-12 22:27:57,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9567 states. [2021-06-12 22:27:57,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9567 to 7248. [2021-06-12 22:27:57,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7248 states, 7247 states have (on average 3.0245618876776597) internal successors, (21919), 7247 states have internal predecessors, (21919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:27:57,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7248 states to 7248 states and 21919 transitions. [2021-06-12 22:27:57,479 INFO L78 Accepts]: Start accepts. Automaton has 7248 states and 21919 transitions. Word has length 48 [2021-06-12 22:27:57,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:27:57,479 INFO L482 AbstractCegarLoop]: Abstraction has 7248 states and 21919 transitions. [2021-06-12 22:27:57,479 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:27:57,479 INFO L276 IsEmpty]: Start isEmpty. Operand 7248 states and 21919 transitions. [2021-06-12 22:27:57,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-12 22:27:57,486 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:27:57,486 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:27:57,686 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable193,191 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:27:57,686 INFO L430 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:27:57,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:27:57,686 INFO L82 PathProgramCache]: Analyzing trace with hash -2014975874, now seen corresponding path program 105 times [2021-06-12 22:27:57,687 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:27:57,687 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621675371] [2021-06-12 22:27:57,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:27:57,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:27:58,086 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:27:58,086 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:27:58,086 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621675371] [2021-06-12 22:27:58,086 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1621675371] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:27:58,086 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [611532909] [2021-06-12 22:27:58,086 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:27:58,120 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 22:27:58,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:27:58,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-12 22:27:58,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:27:58,243 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:27:58,243 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:27:58,256 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:27:58,256 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:27:58,256 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-12 22:27:58,532 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:27:58,533 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:27:58,544 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:27:58,545 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:27:58,545 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-06-12 22:27:59,028 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:27:59,028 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [611532909] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:27:59,028 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:27:59,028 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 24] total 42 [2021-06-12 22:27:59,029 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733159081] [2021-06-12 22:27:59,029 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-06-12 22:27:59,029 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:27:59,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-06-12 22:27:59,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=1666, Unknown=0, NotChecked=0, Total=1806 [2021-06-12 22:27:59,029 INFO L87 Difference]: Start difference. First operand 7248 states and 21919 transitions. Second operand has 43 states, 43 states have (on average 2.046511627906977) internal successors, (88), 42 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:28:01,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:28:01,594 INFO L93 Difference]: Finished difference Result 9808 states and 29584 transitions. [2021-06-12 22:28:01,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-12 22:28:01,594 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.046511627906977) internal successors, (88), 42 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-12 22:28:01,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:28:01,606 INFO L225 Difference]: With dead ends: 9808 [2021-06-12 22:28:01,606 INFO L226 Difference]: Without dead ends: 9768 [2021-06-12 22:28:01,607 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1387 ImplicationChecksByTransitivity, 2479.8ms TimeCoverageRelationStatistics Valid=393, Invalid=4577, Unknown=0, NotChecked=0, Total=4970 [2021-06-12 22:28:01,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9768 states. [2021-06-12 22:28:01,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9768 to 7252. [2021-06-12 22:28:01,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7252 states, 7251 states have (on average 3.0238587780995725) internal successors, (21926), 7251 states have internal predecessors, (21926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:28:01,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7252 states to 7252 states and 21926 transitions. [2021-06-12 22:28:01,696 INFO L78 Accepts]: Start accepts. Automaton has 7252 states and 21926 transitions. Word has length 48 [2021-06-12 22:28:01,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:28:01,696 INFO L482 AbstractCegarLoop]: Abstraction has 7252 states and 21926 transitions. [2021-06-12 22:28:01,696 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 2.046511627906977) internal successors, (88), 42 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:28:01,696 INFO L276 IsEmpty]: Start isEmpty. Operand 7252 states and 21926 transitions. [2021-06-12 22:28:01,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-12 22:28:01,703 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:28:01,703 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:28:01,903 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable194,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:28:01,903 INFO L430 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:28:01,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:28:01,904 INFO L82 PathProgramCache]: Analyzing trace with hash 1403808958, now seen corresponding path program 106 times [2021-06-12 22:28:01,904 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:28:01,904 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107593874] [2021-06-12 22:28:01,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:28:01,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:28:02,299 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:28:02,299 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:28:02,299 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107593874] [2021-06-12 22:28:02,300 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1107593874] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:28:02,300 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [806495824] [2021-06-12 22:28:02,300 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:28:02,332 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:28:02,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:28:02,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-12 22:28:02,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:28:02,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:28:02,463 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:28:02,476 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:28:02,476 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:28:02,476 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-12 22:28:02,629 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-12 22:28:02,630 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:28:02,641 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:28:02,642 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:28:02,642 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:32 [2021-06-12 22:28:03,046 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:28:03,046 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [806495824] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:28:03,046 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:28:03,047 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-12 22:28:03,047 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291909342] [2021-06-12 22:28:03,047 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-12 22:28:03,047 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:28:03,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-12 22:28:03,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1362, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 22:28:03,047 INFO L87 Difference]: Start difference. First operand 7252 states and 21926 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:28:05,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:28:05,017 INFO L93 Difference]: Finished difference Result 9606 states and 28777 transitions. [2021-06-12 22:28:05,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-12 22:28:05,017 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-12 22:28:05,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:28:05,029 INFO L225 Difference]: With dead ends: 9606 [2021-06-12 22:28:05,029 INFO L226 Difference]: Without dead ends: 9559 [2021-06-12 22:28:05,029 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 929 ImplicationChecksByTransitivity, 1805.2ms TimeCoverageRelationStatistics Valid=266, Invalid=3274, Unknown=0, NotChecked=0, Total=3540 [2021-06-12 22:28:05,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9559 states. [2021-06-12 22:28:05,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9559 to 7240. [2021-06-12 22:28:05,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7240 states, 7239 states have (on average 3.0258322972786296) internal successors, (21904), 7239 states have internal predecessors, (21904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:28:05,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7240 states to 7240 states and 21904 transitions. [2021-06-12 22:28:05,125 INFO L78 Accepts]: Start accepts. Automaton has 7240 states and 21904 transitions. Word has length 48 [2021-06-12 22:28:05,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:28:05,126 INFO L482 AbstractCegarLoop]: Abstraction has 7240 states and 21904 transitions. [2021-06-12 22:28:05,126 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:28:05,126 INFO L276 IsEmpty]: Start isEmpty. Operand 7240 states and 21904 transitions. [2021-06-12 22:28:05,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-12 22:28:05,132 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:28:05,132 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:28:05,333 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,193 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:28:05,333 INFO L430 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:28:05,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:28:05,333 INFO L82 PathProgramCache]: Analyzing trace with hash -1021649444, now seen corresponding path program 107 times [2021-06-12 22:28:05,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:28:05,333 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463167409] [2021-06-12 22:28:05,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:28:05,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:28:05,788 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:28:05,788 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:28:05,788 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463167409] [2021-06-12 22:28:05,789 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1463167409] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:28:05,789 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1720026197] [2021-06-12 22:28:05,789 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:28:05,821 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 22:28:05,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:28:05,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-12 22:28:05,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:28:05,995 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:28:05,996 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:28:06,008 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:28:06,009 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:28:06,009 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-12 22:28:06,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:28:06,172 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:28:06,183 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:28:06,184 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:28:06,184 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-06-12 22:28:06,589 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:28:06,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1720026197] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:28:06,590 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:28:06,590 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-12 22:28:06,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853950600] [2021-06-12 22:28:06,590 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-12 22:28:06,590 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:28:06,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-12 22:28:06,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1364, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 22:28:06,590 INFO L87 Difference]: Start difference. First operand 7240 states and 21904 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:28:08,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:28:08,625 INFO L93 Difference]: Finished difference Result 8287 states and 24969 transitions. [2021-06-12 22:28:08,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-12 22:28:08,625 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-12 22:28:08,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:28:08,635 INFO L225 Difference]: With dead ends: 8287 [2021-06-12 22:28:08,635 INFO L226 Difference]: Without dead ends: 8247 [2021-06-12 22:28:08,636 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 967 ImplicationChecksByTransitivity, 2173.5ms TimeCoverageRelationStatistics Valid=308, Invalid=3474, Unknown=0, NotChecked=0, Total=3782 [2021-06-12 22:28:08,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8247 states. [2021-06-12 22:28:08,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8247 to 7246. [2021-06-12 22:28:08,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7246 states, 7245 states have (on average 3.02512077294686) internal successors, (21917), 7245 states have internal predecessors, (21917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:28:08,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7246 states to 7246 states and 21917 transitions. [2021-06-12 22:28:08,723 INFO L78 Accepts]: Start accepts. Automaton has 7246 states and 21917 transitions. Word has length 48 [2021-06-12 22:28:08,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:28:08,723 INFO L482 AbstractCegarLoop]: Abstraction has 7246 states and 21917 transitions. [2021-06-12 22:28:08,723 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:28:08,724 INFO L276 IsEmpty]: Start isEmpty. Operand 7246 states and 21917 transitions. [2021-06-12 22:28:08,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-12 22:28:08,730 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:28:08,730 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:28:08,931 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable196,194 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:28:08,931 INFO L430 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:28:08,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:28:08,931 INFO L82 PathProgramCache]: Analyzing trace with hash 742020486, now seen corresponding path program 108 times [2021-06-12 22:28:08,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:28:08,931 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360551800] [2021-06-12 22:28:08,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:28:08,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:28:09,331 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:28:09,331 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:28:09,331 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360551800] [2021-06-12 22:28:09,331 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360551800] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:28:09,331 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1026700065] [2021-06-12 22:28:09,331 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:28:09,363 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 22:28:09,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:28:09,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 44 conjunts are in the unsatisfiable core [2021-06-12 22:28:09,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:28:09,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:28:09,489 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:28:09,501 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:28:09,502 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:28:09,502 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-12 22:28:09,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:28:09,656 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:28:09,667 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:28:09,667 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:28:09,668 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-06-12 22:28:10,141 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:28:10,142 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1026700065] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:28:10,142 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:28:10,142 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22] total 40 [2021-06-12 22:28:10,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891986475] [2021-06-12 22:28:10,142 INFO L462 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-06-12 22:28:10,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:28:10,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-06-12 22:28:10,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=1510, Unknown=0, NotChecked=0, Total=1640 [2021-06-12 22:28:10,142 INFO L87 Difference]: Start difference. First operand 7246 states and 21917 transitions. Second operand has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:28:12,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:28:12,705 INFO L93 Difference]: Finished difference Result 9711 states and 29079 transitions. [2021-06-12 22:28:12,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-12 22:28:12,706 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-12 22:28:12,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:28:12,717 INFO L225 Difference]: With dead ends: 9711 [2021-06-12 22:28:12,718 INFO L226 Difference]: Without dead ends: 9623 [2021-06-12 22:28:12,718 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1220 ImplicationChecksByTransitivity, 2102.7ms TimeCoverageRelationStatistics Valid=319, Invalid=4103, Unknown=0, NotChecked=0, Total=4422 [2021-06-12 22:28:12,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9623 states. [2021-06-12 22:28:12,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9623 to 7188. [2021-06-12 22:28:12,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7188 states, 7187 states have (on average 3.0321413663559205) internal successors, (21792), 7187 states have internal predecessors, (21792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:28:12,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7188 states to 7188 states and 21792 transitions. [2021-06-12 22:28:12,816 INFO L78 Accepts]: Start accepts. Automaton has 7188 states and 21792 transitions. Word has length 48 [2021-06-12 22:28:12,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:28:12,816 INFO L482 AbstractCegarLoop]: Abstraction has 7188 states and 21792 transitions. [2021-06-12 22:28:12,817 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:28:12,817 INFO L276 IsEmpty]: Start isEmpty. Operand 7188 states and 21792 transitions. [2021-06-12 22:28:12,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-12 22:28:12,823 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:28:12,823 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:28:13,024 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197,195 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:28:13,024 INFO L430 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:28:13,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:28:13,024 INFO L82 PathProgramCache]: Analyzing trace with hash -581388316, now seen corresponding path program 109 times [2021-06-12 22:28:13,024 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:28:13,024 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818173133] [2021-06-12 22:28:13,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:28:13,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:28:13,462 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:28:13,462 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:28:13,462 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818173133] [2021-06-12 22:28:13,462 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1818173133] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:28:13,463 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2118261118] [2021-06-12 22:28:13,463 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:28:13,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:28:13,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-12 22:28:13,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:28:13,620 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:28:13,621 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:28:13,633 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:28:13,633 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:28:13,633 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-12 22:28:13,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-12 22:28:13,791 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:28:13,802 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:28:13,802 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:28:13,802 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:32 [2021-06-12 22:28:14,214 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:28:14,214 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2118261118] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:28:14,214 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:28:14,214 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-12 22:28:14,214 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371099945] [2021-06-12 22:28:14,215 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-12 22:28:14,215 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:28:14,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-12 22:28:14,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1372, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 22:28:14,215 INFO L87 Difference]: Start difference. First operand 7188 states and 21792 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:28:16,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:28:16,371 INFO L93 Difference]: Finished difference Result 8186 states and 24732 transitions. [2021-06-12 22:28:16,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-12 22:28:16,371 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-12 22:28:16,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:28:16,381 INFO L225 Difference]: With dead ends: 8186 [2021-06-12 22:28:16,381 INFO L226 Difference]: Without dead ends: 8146 [2021-06-12 22:28:16,382 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 850 ImplicationChecksByTransitivity, 2032.8ms TimeCoverageRelationStatistics Valid=269, Invalid=3271, Unknown=0, NotChecked=0, Total=3540 [2021-06-12 22:28:16,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8146 states. [2021-06-12 22:28:16,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8146 to 7200. [2021-06-12 22:28:16,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7200 states, 7199 states have (on average 3.0311154326989858) internal successors, (21821), 7199 states have internal predecessors, (21821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:28:16,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7200 states to 7200 states and 21821 transitions. [2021-06-12 22:28:16,464 INFO L78 Accepts]: Start accepts. Automaton has 7200 states and 21821 transitions. Word has length 48 [2021-06-12 22:28:16,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:28:16,464 INFO L482 AbstractCegarLoop]: Abstraction has 7200 states and 21821 transitions. [2021-06-12 22:28:16,464 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:28:16,464 INFO L276 IsEmpty]: Start isEmpty. Operand 7200 states and 21821 transitions. [2021-06-12 22:28:16,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-12 22:28:16,471 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:28:16,471 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:28:16,671 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable198,196 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:28:16,671 INFO L430 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:28:16,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:28:16,671 INFO L82 PathProgramCache]: Analyzing trace with hash -1457570780, now seen corresponding path program 110 times [2021-06-12 22:28:16,671 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:28:16,672 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673598959] [2021-06-12 22:28:16,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:28:16,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:28:17,060 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:28:17,060 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:28:17,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673598959] [2021-06-12 22:28:17,060 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1673598959] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:28:17,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [550607076] [2021-06-12 22:28:17,060 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:28:17,092 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:28:17,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:28:17,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-12 22:28:17,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:28:17,218 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:28:17,219 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:28:17,231 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:28:17,232 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:28:17,232 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-12 22:28:17,388 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:28:17,389 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:28:17,399 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:28:17,400 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:28:17,400 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-06-12 22:28:17,803 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:28:17,804 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [550607076] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:28:17,804 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:28:17,804 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-12 22:28:17,804 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766257876] [2021-06-12 22:28:17,804 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-12 22:28:17,804 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:28:17,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-12 22:28:17,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1370, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 22:28:17,805 INFO L87 Difference]: Start difference. First operand 7200 states and 21821 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:28:19,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:28:19,495 INFO L93 Difference]: Finished difference Result 9434 states and 28333 transitions. [2021-06-12 22:28:19,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-12 22:28:19,495 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-12 22:28:19,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:28:19,507 INFO L225 Difference]: With dead ends: 9434 [2021-06-12 22:28:19,507 INFO L226 Difference]: Without dead ends: 9395 [2021-06-12 22:28:19,507 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 810 ImplicationChecksByTransitivity, 1751.0ms TimeCoverageRelationStatistics Valid=234, Invalid=3072, Unknown=0, NotChecked=0, Total=3306 [2021-06-12 22:28:19,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9395 states. [2021-06-12 22:28:19,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9395 to 7196. [2021-06-12 22:28:19,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7196 states, 7195 states have (on average 3.031271716469771) internal successors, (21810), 7195 states have internal predecessors, (21810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:28:19,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7196 states to 7196 states and 21810 transitions. [2021-06-12 22:28:19,607 INFO L78 Accepts]: Start accepts. Automaton has 7196 states and 21810 transitions. Word has length 48 [2021-06-12 22:28:19,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:28:19,607 INFO L482 AbstractCegarLoop]: Abstraction has 7196 states and 21810 transitions. [2021-06-12 22:28:19,607 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:28:19,607 INFO L276 IsEmpty]: Start isEmpty. Operand 7196 states and 21810 transitions. [2021-06-12 22:28:19,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-12 22:28:19,614 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:28:19,614 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:28:19,814 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable199 [2021-06-12 22:28:19,814 INFO L430 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:28:19,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:28:19,814 INFO L82 PathProgramCache]: Analyzing trace with hash -1315855640, now seen corresponding path program 111 times [2021-06-12 22:28:19,814 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:28:19,814 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392701149] [2021-06-12 22:28:19,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:28:19,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:28:20,227 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:28:20,227 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:28:20,227 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392701149] [2021-06-12 22:28:20,227 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1392701149] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:28:20,227 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865410181] [2021-06-12 22:28:20,227 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:28:20,260 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 22:28:20,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:28:20,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-12 22:28:20,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:28:20,386 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:28:20,387 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:28:20,400 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:28:20,400 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:28:20,400 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-12 22:28:20,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-12 22:28:20,572 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:28:20,584 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:28:20,584 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:28:20,584 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:32 [2021-06-12 22:28:21,024 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:28:21,024 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [865410181] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:28:21,024 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:28:21,024 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-12 22:28:21,024 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406611491] [2021-06-12 22:28:21,024 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-12 22:28:21,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:28:21,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-12 22:28:21,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1370, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 22:28:21,025 INFO L87 Difference]: Start difference. First operand 7196 states and 21810 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:28:22,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:28:22,960 INFO L93 Difference]: Finished difference Result 9548 states and 28578 transitions. [2021-06-12 22:28:22,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-12 22:28:22,960 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-12 22:28:22,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:28:22,972 INFO L225 Difference]: With dead ends: 9548 [2021-06-12 22:28:22,972 INFO L226 Difference]: Without dead ends: 9491 [2021-06-12 22:28:22,972 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 782 ImplicationChecksByTransitivity, 1791.2ms TimeCoverageRelationStatistics Valid=229, Invalid=2963, Unknown=0, NotChecked=0, Total=3192 [2021-06-12 22:28:22,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9491 states. [2021-06-12 22:28:23,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9491 to 7202. [2021-06-12 22:28:23,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7202 states, 7201 states have (on average 3.0305513123177334) internal successors, (21823), 7201 states have internal predecessors, (21823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:28:23,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7202 states to 7202 states and 21823 transitions. [2021-06-12 22:28:23,125 INFO L78 Accepts]: Start accepts. Automaton has 7202 states and 21823 transitions. Word has length 48 [2021-06-12 22:28:23,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:28:23,125 INFO L482 AbstractCegarLoop]: Abstraction has 7202 states and 21823 transitions. [2021-06-12 22:28:23,125 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:28:23,126 INFO L276 IsEmpty]: Start isEmpty. Operand 7202 states and 21823 transitions. [2021-06-12 22:28:23,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-12 22:28:23,133 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:28:23,133 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:28:23,333 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable200 [2021-06-12 22:28:23,333 INFO L430 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:28:23,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:28:23,334 INFO L82 PathProgramCache]: Analyzing trace with hash 1695964196, now seen corresponding path program 112 times [2021-06-12 22:28:23,334 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:28:23,334 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910559223] [2021-06-12 22:28:23,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:28:23,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:28:23,734 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:28:23,734 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:28:23,734 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910559223] [2021-06-12 22:28:23,734 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [910559223] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:28:23,734 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1946146709] [2021-06-12 22:28:23,734 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:28:23,766 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:28:23,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:28:23,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-12 22:28:23,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:28:23,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:28:23,889 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:28:23,901 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:28:23,902 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:28:23,902 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-12 22:28:24,056 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-12 22:28:24,056 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:28:24,068 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:28:24,068 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:28:24,068 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:32 [2021-06-12 22:28:24,461 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:28:24,461 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1946146709] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:28:24,461 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:28:24,461 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-12 22:28:24,461 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475216997] [2021-06-12 22:28:24,461 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-12 22:28:24,461 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:28:24,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-12 22:28:24,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=1368, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 22:28:24,462 INFO L87 Difference]: Start difference. First operand 7202 states and 21823 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:28:26,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:28:26,302 INFO L93 Difference]: Finished difference Result 9499 states and 28470 transitions. [2021-06-12 22:28:26,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-12 22:28:26,302 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-12 22:28:26,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:28:26,314 INFO L225 Difference]: With dead ends: 9499 [2021-06-12 22:28:26,315 INFO L226 Difference]: Without dead ends: 9405 [2021-06-12 22:28:26,315 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 802 ImplicationChecksByTransitivity, 1694.9ms TimeCoverageRelationStatistics Valid=232, Invalid=2960, Unknown=0, NotChecked=0, Total=3192 [2021-06-12 22:28:26,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9405 states. [2021-06-12 22:28:26,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9405 to 7182. [2021-06-12 22:28:26,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7182 states, 7181 states have (on average 3.0330037599220163) internal successors, (21780), 7181 states have internal predecessors, (21780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:28:26,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7182 states to 7182 states and 21780 transitions. [2021-06-12 22:28:26,413 INFO L78 Accepts]: Start accepts. Automaton has 7182 states and 21780 transitions. Word has length 48 [2021-06-12 22:28:26,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:28:26,413 INFO L482 AbstractCegarLoop]: Abstraction has 7182 states and 21780 transitions. [2021-06-12 22:28:26,413 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:28:26,413 INFO L276 IsEmpty]: Start isEmpty. Operand 7182 states and 21780 transitions. [2021-06-12 22:28:26,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-12 22:28:26,420 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:28:26,420 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:28:26,620 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable201,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:28:26,621 INFO L430 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:28:26,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:28:26,621 INFO L82 PathProgramCache]: Analyzing trace with hash -910327414, now seen corresponding path program 113 times [2021-06-12 22:28:26,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:28:26,621 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768187834] [2021-06-12 22:28:26,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:28:26,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:28:27,022 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:28:27,022 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:28:27,023 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768187834] [2021-06-12 22:28:27,023 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768187834] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:28:27,023 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1145571253] [2021-06-12 22:28:27,023 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:28:27,055 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 22:28:27,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:28:27,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 44 conjunts are in the unsatisfiable core [2021-06-12 22:28:27,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:28:27,179 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:28:27,180 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:28:27,192 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:28:27,193 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:28:27,193 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-12 22:28:27,349 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:28:27,350 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:28:27,361 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:28:27,361 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:28:27,361 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-06-12 22:28:27,782 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:28:27,782 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1145571253] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:28:27,782 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:28:27,782 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-12 22:28:27,782 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043296338] [2021-06-12 22:28:27,782 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-12 22:28:27,782 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:28:27,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-12 22:28:27,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1372, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 22:28:27,783 INFO L87 Difference]: Start difference. First operand 7182 states and 21780 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:28:29,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:28:29,964 INFO L93 Difference]: Finished difference Result 8190 states and 24743 transitions. [2021-06-12 22:28:29,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-12 22:28:29,965 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-12 22:28:29,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:28:29,975 INFO L225 Difference]: With dead ends: 8190 [2021-06-12 22:28:29,975 INFO L226 Difference]: Without dead ends: 8150 [2021-06-12 22:28:29,975 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 850 ImplicationChecksByTransitivity, 2018.6ms TimeCoverageRelationStatistics Valid=269, Invalid=3271, Unknown=0, NotChecked=0, Total=3540 [2021-06-12 22:28:29,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8150 states. [2021-06-12 22:28:30,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8150 to 7200. [2021-06-12 22:28:30,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7200 states, 7199 states have (on average 3.0316710654257535) internal successors, (21825), 7199 states have internal predecessors, (21825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:28:30,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7200 states to 7200 states and 21825 transitions. [2021-06-12 22:28:30,060 INFO L78 Accepts]: Start accepts. Automaton has 7200 states and 21825 transitions. Word has length 48 [2021-06-12 22:28:30,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:28:30,060 INFO L482 AbstractCegarLoop]: Abstraction has 7200 states and 21825 transitions. [2021-06-12 22:28:30,060 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:28:30,060 INFO L276 IsEmpty]: Start isEmpty. Operand 7200 states and 21825 transitions. [2021-06-12 22:28:30,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-12 22:28:30,067 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:28:30,067 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:28:30,267 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable202 [2021-06-12 22:28:30,268 INFO L430 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:28:30,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:28:30,268 INFO L82 PathProgramCache]: Analyzing trace with hash -1139086258, now seen corresponding path program 114 times [2021-06-12 22:28:30,268 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:28:30,268 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44907427] [2021-06-12 22:28:30,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:28:30,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:28:30,699 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:28:30,700 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:28:30,700 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44907427] [2021-06-12 22:28:30,700 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [44907427] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:28:30,700 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1222909586] [2021-06-12 22:28:30,700 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:28:30,732 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 22:28:30,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:28:30,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-12 22:28:30,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:28:30,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:28:30,859 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:28:30,871 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:28:30,872 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:28:30,872 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-12 22:28:31,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:28:31,029 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:28:31,039 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:28:31,040 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:28:31,040 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-06-12 22:28:31,454 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:28:31,454 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1222909586] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:28:31,454 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:28:31,454 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-12 22:28:31,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820629202] [2021-06-12 22:28:31,454 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-12 22:28:31,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:28:31,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-12 22:28:31,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1370, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 22:28:31,455 INFO L87 Difference]: Start difference. First operand 7200 states and 21825 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:28:33,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:28:33,146 INFO L93 Difference]: Finished difference Result 9438 states and 28345 transitions. [2021-06-12 22:28:33,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-12 22:28:33,146 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-12 22:28:33,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:28:33,156 INFO L225 Difference]: With dead ends: 9438 [2021-06-12 22:28:33,156 INFO L226 Difference]: Without dead ends: 9393 [2021-06-12 22:28:33,156 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 810 ImplicationChecksByTransitivity, 1802.9ms TimeCoverageRelationStatistics Valid=234, Invalid=3072, Unknown=0, NotChecked=0, Total=3306 [2021-06-12 22:28:33,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9393 states. [2021-06-12 22:28:33,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9393 to 7194. [2021-06-12 22:28:33,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7194 states, 7193 states have (on average 3.031558459613513) internal successors, (21806), 7193 states have internal predecessors, (21806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:28:33,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7194 states to 7194 states and 21806 transitions. [2021-06-12 22:28:33,246 INFO L78 Accepts]: Start accepts. Automaton has 7194 states and 21806 transitions. Word has length 48 [2021-06-12 22:28:33,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:28:33,246 INFO L482 AbstractCegarLoop]: Abstraction has 7194 states and 21806 transitions. [2021-06-12 22:28:33,246 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:28:33,246 INFO L276 IsEmpty]: Start isEmpty. Operand 7194 states and 21806 transitions. [2021-06-12 22:28:33,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-12 22:28:33,253 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:28:33,253 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:28:33,454 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable203,201 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:28:33,455 INFO L430 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:28:33,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:28:33,455 INFO L82 PathProgramCache]: Analyzing trace with hash -2085818058, now seen corresponding path program 115 times [2021-06-12 22:28:33,455 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:28:33,455 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685800990] [2021-06-12 22:28:33,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:28:33,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:28:33,860 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:28:33,860 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:28:33,860 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685800990] [2021-06-12 22:28:33,860 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1685800990] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:28:33,860 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [491961468] [2021-06-12 22:28:33,860 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:28:33,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:28:33,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-12 22:28:33,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:28:34,023 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:28:34,024 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:28:34,036 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:28:34,037 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:28:34,037 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-12 22:28:34,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-12 22:28:34,196 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:28:34,207 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:28:34,208 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:28:34,208 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:32 [2021-06-12 22:28:34,614 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:28:34,615 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [491961468] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:28:34,615 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:28:34,615 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-12 22:28:34,615 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288143937] [2021-06-12 22:28:34,615 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-12 22:28:34,615 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:28:34,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-12 22:28:34,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1370, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 22:28:34,615 INFO L87 Difference]: Start difference. First operand 7194 states and 21806 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:28:36,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:28:36,615 INFO L93 Difference]: Finished difference Result 9542 states and 28565 transitions. [2021-06-12 22:28:36,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-12 22:28:36,615 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-12 22:28:36,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:28:36,627 INFO L225 Difference]: With dead ends: 9542 [2021-06-12 22:28:36,627 INFO L226 Difference]: Without dead ends: 9483 [2021-06-12 22:28:36,627 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 782 ImplicationChecksByTransitivity, 1760.8ms TimeCoverageRelationStatistics Valid=229, Invalid=2963, Unknown=0, NotChecked=0, Total=3192 [2021-06-12 22:28:36,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9483 states. [2021-06-12 22:28:36,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9483 to 7200. [2021-06-12 22:28:36,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7200 states, 7199 states have (on average 3.030837616335602) internal successors, (21819), 7199 states have internal predecessors, (21819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:28:36,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7200 states to 7200 states and 21819 transitions. [2021-06-12 22:28:36,732 INFO L78 Accepts]: Start accepts. Automaton has 7200 states and 21819 transitions. Word has length 48 [2021-06-12 22:28:36,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:28:36,732 INFO L482 AbstractCegarLoop]: Abstraction has 7200 states and 21819 transitions. [2021-06-12 22:28:36,732 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:28:36,732 INFO L276 IsEmpty]: Start isEmpty. Operand 7200 states and 21819 transitions. [2021-06-12 22:28:36,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-12 22:28:36,739 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:28:36,739 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:28:36,939 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 202 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable204 [2021-06-12 22:28:36,939 INFO L430 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:28:36,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:28:36,940 INFO L82 PathProgramCache]: Analyzing trace with hash 2054711720, now seen corresponding path program 116 times [2021-06-12 22:28:36,940 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:28:36,940 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931514236] [2021-06-12 22:28:36,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:28:36,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:28:37,376 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:28:37,376 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:28:37,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931514236] [2021-06-12 22:28:37,376 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1931514236] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:28:37,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1491391289] [2021-06-12 22:28:37,376 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:28:37,408 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:28:37,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:28:37,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-12 22:28:37,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:28:37,532 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:28:37,533 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:28:37,545 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:28:37,546 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:28:37,546 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-12 22:28:37,698 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-12 22:28:37,699 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:28:37,710 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:28:37,710 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:28:37,710 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:32 [2021-06-12 22:28:38,147 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:28:38,147 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1491391289] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:28:38,147 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:28:38,147 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-12 22:28:38,147 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595316691] [2021-06-12 22:28:38,148 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-12 22:28:38,148 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:28:38,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-12 22:28:38,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=1368, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 22:28:38,148 INFO L87 Difference]: Start difference. First operand 7200 states and 21819 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:28:39,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:28:39,895 INFO L93 Difference]: Finished difference Result 9489 states and 28452 transitions. [2021-06-12 22:28:39,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-12 22:28:39,895 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-12 22:28:39,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:28:39,906 INFO L225 Difference]: With dead ends: 9489 [2021-06-12 22:28:39,907 INFO L226 Difference]: Without dead ends: 9333 [2021-06-12 22:28:39,907 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 802 ImplicationChecksByTransitivity, 1770.6ms TimeCoverageRelationStatistics Valid=232, Invalid=2960, Unknown=0, NotChecked=0, Total=3192 [2021-06-12 22:28:39,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9333 states. [2021-06-12 22:28:39,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9333 to 7134. [2021-06-12 22:28:39,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7134 states, 7133 states have (on average 3.035188560213094) internal successors, (21650), 7133 states have internal predecessors, (21650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:28:39,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7134 states to 7134 states and 21650 transitions. [2021-06-12 22:28:39,999 INFO L78 Accepts]: Start accepts. Automaton has 7134 states and 21650 transitions. Word has length 48 [2021-06-12 22:28:40,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:28:40,000 INFO L482 AbstractCegarLoop]: Abstraction has 7134 states and 21650 transitions. [2021-06-12 22:28:40,000 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:28:40,000 INFO L276 IsEmpty]: Start isEmpty. Operand 7134 states and 21650 transitions. [2021-06-12 22:28:40,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-12 22:28:40,007 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:28:40,007 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:28:40,207 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable205,203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:28:40,208 INFO L430 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:28:40,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:28:40,208 INFO L82 PathProgramCache]: Analyzing trace with hash 531324350, now seen corresponding path program 117 times [2021-06-12 22:28:40,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:28:40,208 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286231499] [2021-06-12 22:28:40,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:28:40,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:28:40,649 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:28:40,649 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:28:40,649 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286231499] [2021-06-12 22:28:40,649 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286231499] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:28:40,650 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [538951231] [2021-06-12 22:28:40,650 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:28:40,681 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 22:28:40,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:28:40,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-12 22:28:40,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:28:40,808 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:28:40,809 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:28:40,821 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:28:40,821 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:28:40,821 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-12 22:28:40,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:28:40,982 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:28:40,993 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:28:40,993 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:28:40,993 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-06-12 22:28:41,439 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:28:41,440 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [538951231] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:28:41,440 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:28:41,440 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-12 22:28:41,440 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130884765] [2021-06-12 22:28:41,440 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-12 22:28:41,440 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:28:41,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-12 22:28:41,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1372, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 22:28:41,440 INFO L87 Difference]: Start difference. First operand 7134 states and 21650 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:28:43,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:28:43,712 INFO L93 Difference]: Finished difference Result 8132 states and 24590 transitions. [2021-06-12 22:28:43,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-12 22:28:43,713 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-12 22:28:43,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:28:43,722 INFO L225 Difference]: With dead ends: 8132 [2021-06-12 22:28:43,722 INFO L226 Difference]: Without dead ends: 8092 [2021-06-12 22:28:43,723 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 799 ImplicationChecksByTransitivity, 2101.1ms TimeCoverageRelationStatistics Valid=279, Invalid=3143, Unknown=0, NotChecked=0, Total=3422 [2021-06-12 22:28:43,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8092 states. [2021-06-12 22:28:43,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8092 to 7142. [2021-06-12 22:28:43,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7142 states, 7141 states have (on average 3.0344489567287494) internal successors, (21669), 7141 states have internal predecessors, (21669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:28:43,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7142 states to 7142 states and 21669 transitions. [2021-06-12 22:28:43,802 INFO L78 Accepts]: Start accepts. Automaton has 7142 states and 21669 transitions. Word has length 48 [2021-06-12 22:28:43,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:28:43,803 INFO L482 AbstractCegarLoop]: Abstraction has 7142 states and 21669 transitions. [2021-06-12 22:28:43,803 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:28:43,803 INFO L276 IsEmpty]: Start isEmpty. Operand 7142 states and 21669 transitions. [2021-06-12 22:28:43,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-12 22:28:43,809 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:28:43,809 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:28:44,009 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 204 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable206 [2021-06-12 22:28:44,010 INFO L430 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:28:44,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:28:44,010 INFO L82 PathProgramCache]: Analyzing trace with hash -344858114, now seen corresponding path program 118 times [2021-06-12 22:28:44,010 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:28:44,010 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372183515] [2021-06-12 22:28:44,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:28:44,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:28:44,407 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:28:44,407 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:28:44,408 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372183515] [2021-06-12 22:28:44,408 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372183515] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:28:44,408 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2101732573] [2021-06-12 22:28:44,408 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:28:44,439 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:28:44,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:28:44,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-12 22:28:44,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:28:44,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:28:44,569 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:28:44,581 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:28:44,581 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:28:44,582 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-12 22:28:44,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-12 22:28:44,738 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:28:44,749 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:28:44,749 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:28:44,749 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:32 [2021-06-12 22:28:45,164 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:28:45,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2101732573] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:28:45,164 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:28:45,164 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-12 22:28:45,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548629032] [2021-06-12 22:28:45,164 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-12 22:28:45,164 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:28:45,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-12 22:28:45,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1372, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 22:28:45,165 INFO L87 Difference]: Start difference. First operand 7142 states and 21669 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:28:47,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:28:47,215 INFO L93 Difference]: Finished difference Result 8098 states and 24521 transitions. [2021-06-12 22:28:47,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-12 22:28:47,215 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-12 22:28:47,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:28:47,225 INFO L225 Difference]: With dead ends: 8098 [2021-06-12 22:28:47,225 INFO L226 Difference]: Without dead ends: 8059 [2021-06-12 22:28:47,225 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 780 ImplicationChecksByTransitivity, 1913.7ms TimeCoverageRelationStatistics Valid=256, Invalid=3050, Unknown=0, NotChecked=0, Total=3306 [2021-06-12 22:28:47,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8059 states. [2021-06-12 22:28:47,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8059 to 7138. [2021-06-12 22:28:47,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7138 states, 7137 states have (on average 3.0350287235533138) internal successors, (21661), 7137 states have internal predecessors, (21661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:28:47,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7138 states to 7138 states and 21661 transitions. [2021-06-12 22:28:47,304 INFO L78 Accepts]: Start accepts. Automaton has 7138 states and 21661 transitions. Word has length 48 [2021-06-12 22:28:47,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:28:47,304 INFO L482 AbstractCegarLoop]: Abstraction has 7138 states and 21661 transitions. [2021-06-12 22:28:47,304 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:28:47,304 INFO L276 IsEmpty]: Start isEmpty. Operand 7138 states and 21661 transitions. [2021-06-12 22:28:47,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-12 22:28:47,310 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:28:47,310 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:28:47,511 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:28:47,511 INFO L430 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:28:47,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:28:47,511 INFO L82 PathProgramCache]: Analyzing trace with hash 899189246, now seen corresponding path program 119 times [2021-06-12 22:28:47,511 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:28:47,511 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775856106] [2021-06-12 22:28:47,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:28:47,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:28:47,910 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:28:47,911 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:28:47,911 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775856106] [2021-06-12 22:28:47,911 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775856106] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:28:47,911 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [69218415] [2021-06-12 22:28:47,911 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:28:47,943 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 22:28:47,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:28:47,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 44 conjunts are in the unsatisfiable core [2021-06-12 22:28:47,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:28:48,127 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:28:48,128 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:28:48,141 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:28:48,141 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:28:48,141 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-12 22:28:48,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:28:48,303 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:28:48,314 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:28:48,315 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:28:48,315 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-06-12 22:28:48,738 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:28:48,738 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [69218415] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:28:48,738 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:28:48,738 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-12 22:28:48,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519101356] [2021-06-12 22:28:48,738 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-12 22:28:48,738 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:28:48,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-12 22:28:48,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1372, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 22:28:48,739 INFO L87 Difference]: Start difference. First operand 7138 states and 21661 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:28:50,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:28:50,938 INFO L93 Difference]: Finished difference Result 8138 states and 24602 transitions. [2021-06-12 22:28:50,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-12 22:28:50,938 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-12 22:28:50,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:28:50,948 INFO L225 Difference]: With dead ends: 8138 [2021-06-12 22:28:50,948 INFO L226 Difference]: Without dead ends: 8098 [2021-06-12 22:28:50,948 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 799 ImplicationChecksByTransitivity, 2051.6ms TimeCoverageRelationStatistics Valid=279, Invalid=3143, Unknown=0, NotChecked=0, Total=3422 [2021-06-12 22:28:50,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8098 states. [2021-06-12 22:28:51,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8098 to 7144. [2021-06-12 22:28:51,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7144 states, 7143 states have (on average 3.0342993140137198) internal successors, (21674), 7143 states have internal predecessors, (21674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:28:51,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7144 states to 7144 states and 21674 transitions. [2021-06-12 22:28:51,030 INFO L78 Accepts]: Start accepts. Automaton has 7144 states and 21674 transitions. Word has length 48 [2021-06-12 22:28:51,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:28:51,030 INFO L482 AbstractCegarLoop]: Abstraction has 7144 states and 21674 transitions. [2021-06-12 22:28:51,030 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:28:51,030 INFO L276 IsEmpty]: Start isEmpty. Operand 7144 states and 21674 transitions. [2021-06-12 22:28:51,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-12 22:28:51,037 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:28:51,037 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:28:51,237 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable208,206 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:28:51,237 INFO L430 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:28:51,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:28:51,237 INFO L82 PathProgramCache]: Analyzing trace with hash -1632108120, now seen corresponding path program 120 times [2021-06-12 22:28:51,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:28:51,237 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809235858] [2021-06-12 22:28:51,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:28:51,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:28:51,636 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:28:51,636 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:28:51,636 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809235858] [2021-06-12 22:28:51,636 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809235858] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:28:51,636 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [961062765] [2021-06-12 22:28:51,636 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:28:51,668 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 22:28:51,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:28:51,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-12 22:28:51,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:28:51,797 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:28:51,798 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:28:51,811 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:28:51,812 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:28:51,812 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-12 22:28:51,971 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:28:51,972 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:28:51,983 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:28:51,984 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:28:51,984 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-06-12 22:28:52,419 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:28:52,419 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [961062765] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:28:52,419 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:28:52,419 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-12 22:28:52,419 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205029731] [2021-06-12 22:28:52,420 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-12 22:28:52,420 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:28:52,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-12 22:28:52,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1372, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 22:28:52,420 INFO L87 Difference]: Start difference. First operand 7144 states and 21674 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:28:54,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:28:54,349 INFO L93 Difference]: Finished difference Result 8108 states and 24542 transitions. [2021-06-12 22:28:54,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-12 22:28:54,349 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-12 22:28:54,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:28:54,358 INFO L225 Difference]: With dead ends: 8108 [2021-06-12 22:28:54,359 INFO L226 Difference]: Without dead ends: 8063 [2021-06-12 22:28:54,359 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 780 ImplicationChecksByTransitivity, 1954.3ms TimeCoverageRelationStatistics Valid=256, Invalid=3050, Unknown=0, NotChecked=0, Total=3306 [2021-06-12 22:28:54,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8063 states. [2021-06-12 22:28:54,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8063 to 7138. [2021-06-12 22:28:54,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7138 states, 7137 states have (on average 3.034748493764887) internal successors, (21659), 7137 states have internal predecessors, (21659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:28:54,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7138 states to 7138 states and 21659 transitions. [2021-06-12 22:28:54,440 INFO L78 Accepts]: Start accepts. Automaton has 7138 states and 21659 transitions. Word has length 48 [2021-06-12 22:28:54,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:28:54,441 INFO L482 AbstractCegarLoop]: Abstraction has 7138 states and 21659 transitions. [2021-06-12 22:28:54,441 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:28:54,441 INFO L276 IsEmpty]: Start isEmpty. Operand 7138 states and 21659 transitions. [2021-06-12 22:28:54,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-12 22:28:54,447 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:28:54,447 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:28:54,648 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable209 [2021-06-12 22:28:54,648 INFO L430 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:28:54,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:28:54,648 INFO L82 PathProgramCache]: Analyzing trace with hash -1571811778, now seen corresponding path program 121 times [2021-06-12 22:28:54,648 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:28:54,648 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503004073] [2021-06-12 22:28:54,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:28:54,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:28:55,045 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:28:55,045 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:28:55,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503004073] [2021-06-12 22:28:55,045 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503004073] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:28:55,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1287029753] [2021-06-12 22:28:55,045 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:28:55,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:28:55,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-12 22:28:55,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:28:55,203 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:28:55,204 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:28:55,217 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:28:55,217 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:28:55,217 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-12 22:28:55,384 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-12 22:28:55,385 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:28:55,396 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:28:55,397 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:28:55,397 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:32 [2021-06-12 22:28:55,842 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:28:55,842 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1287029753] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:28:55,842 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:28:55,842 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-12 22:28:55,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740162331] [2021-06-12 22:28:55,842 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-12 22:28:55,842 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:28:55,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-12 22:28:55,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1370, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 22:28:55,843 INFO L87 Difference]: Start difference. First operand 7138 states and 21659 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:28:57,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:28:57,581 INFO L93 Difference]: Finished difference Result 9376 states and 28181 transitions. [2021-06-12 22:28:57,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-12 22:28:57,581 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-12 22:28:57,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:28:57,593 INFO L225 Difference]: With dead ends: 9376 [2021-06-12 22:28:57,593 INFO L226 Difference]: Without dead ends: 9341 [2021-06-12 22:28:57,593 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 777 ImplicationChecksByTransitivity, 1730.0ms TimeCoverageRelationStatistics Valid=229, Invalid=2963, Unknown=0, NotChecked=0, Total=3192 [2021-06-12 22:28:57,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9341 states. [2021-06-12 22:28:57,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9341 to 7142. [2021-06-12 22:28:57,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7142 states, 7141 states have (on average 3.0341688839098166) internal successors, (21667), 7141 states have internal predecessors, (21667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:28:57,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7142 states to 7142 states and 21667 transitions. [2021-06-12 22:28:57,686 INFO L78 Accepts]: Start accepts. Automaton has 7142 states and 21667 transitions. Word has length 48 [2021-06-12 22:28:57,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:28:57,721 INFO L482 AbstractCegarLoop]: Abstraction has 7142 states and 21667 transitions. [2021-06-12 22:28:57,721 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:28:57,721 INFO L276 IsEmpty]: Start isEmpty. Operand 7142 states and 21667 transitions. [2021-06-12 22:28:57,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-12 22:28:57,728 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:28:57,728 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:28:57,928 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 208 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable210 [2021-06-12 22:28:57,929 INFO L430 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:28:57,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:28:57,929 INFO L82 PathProgramCache]: Analyzing trace with hash 2115717758, now seen corresponding path program 122 times [2021-06-12 22:28:57,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:28:57,929 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38756516] [2021-06-12 22:28:57,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:28:57,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:28:58,385 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:28:58,385 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:28:58,386 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38756516] [2021-06-12 22:28:58,386 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38756516] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:28:58,386 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [443003745] [2021-06-12 22:28:58,386 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:28:58,418 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:28:58,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:28:58,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-12 22:28:58,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:28:58,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:28:58,545 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:28:58,558 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:28:58,558 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:28:58,558 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-12 22:28:58,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-12 22:28:58,714 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:28:58,725 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:28:58,725 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:28:58,725 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:32 [2021-06-12 22:28:59,132 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:28:59,132 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [443003745] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:28:59,132 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:28:59,133 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-12 22:28:59,133 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084670930] [2021-06-12 22:28:59,133 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-12 22:28:59,133 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:28:59,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-12 22:28:59,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1370, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 22:28:59,133 INFO L87 Difference]: Start difference. First operand 7142 states and 21667 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:29:00,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:29:00,945 INFO L93 Difference]: Finished difference Result 9380 states and 28187 transitions. [2021-06-12 22:29:00,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-12 22:29:00,945 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-12 22:29:00,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:29:00,957 INFO L225 Difference]: With dead ends: 9380 [2021-06-12 22:29:00,957 INFO L226 Difference]: Without dead ends: 9335 [2021-06-12 22:29:00,957 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 777 ImplicationChecksByTransitivity, 1786.4ms TimeCoverageRelationStatistics Valid=229, Invalid=2963, Unknown=0, NotChecked=0, Total=3192 [2021-06-12 22:29:00,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9335 states. [2021-06-12 22:29:01,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9335 to 7136. [2021-06-12 22:29:01,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7136 states, 7135 states have (on average 3.0348983882270497) internal successors, (21654), 7135 states have internal predecessors, (21654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:29:01,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7136 states to 7136 states and 21654 transitions. [2021-06-12 22:29:01,052 INFO L78 Accepts]: Start accepts. Automaton has 7136 states and 21654 transitions. Word has length 48 [2021-06-12 22:29:01,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:29:01,052 INFO L482 AbstractCegarLoop]: Abstraction has 7136 states and 21654 transitions. [2021-06-12 22:29:01,052 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:29:01,052 INFO L276 IsEmpty]: Start isEmpty. Operand 7136 states and 21654 transitions. [2021-06-12 22:29:01,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-12 22:29:01,059 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:29:01,059 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:29:01,259 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable211 [2021-06-12 22:29:01,260 INFO L430 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:29:01,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:29:01,260 INFO L82 PathProgramCache]: Analyzing trace with hash -1642086766, now seen corresponding path program 123 times [2021-06-12 22:29:01,260 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:29:01,260 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597881665] [2021-06-12 22:29:01,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:29:01,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:29:01,678 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:29:01,678 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:29:01,678 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597881665] [2021-06-12 22:29:01,678 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597881665] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:29:01,678 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [904669009] [2021-06-12 22:29:01,678 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:29:01,711 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 22:29:01,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:29:01,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-12 22:29:01,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:29:01,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:29:01,839 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:29:01,851 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:29:01,851 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:29:01,851 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-12 22:29:02,008 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:29:02,008 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:29:02,019 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:29:02,020 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:29:02,020 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-06-12 22:29:02,438 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:29:02,438 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [904669009] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:29:02,438 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:29:02,438 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-12 22:29:02,439 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129339285] [2021-06-12 22:29:02,439 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-12 22:29:02,439 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:29:02,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-12 22:29:02,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1372, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 22:29:02,439 INFO L87 Difference]: Start difference. First operand 7136 states and 21654 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:29:04,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:29:04,731 INFO L93 Difference]: Finished difference Result 8143 states and 24614 transitions. [2021-06-12 22:29:04,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-12 22:29:04,731 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-12 22:29:04,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:29:04,741 INFO L225 Difference]: With dead ends: 8143 [2021-06-12 22:29:04,741 INFO L226 Difference]: Without dead ends: 8090 [2021-06-12 22:29:04,742 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 849 ImplicationChecksByTransitivity, 2008.0ms TimeCoverageRelationStatistics Valid=274, Invalid=3266, Unknown=0, NotChecked=0, Total=3540 [2021-06-12 22:29:04,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8090 states. [2021-06-12 22:29:04,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8090 to 7144. [2021-06-12 22:29:04,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7144 states, 7143 states have (on average 3.033459330813384) internal successors, (21668), 7143 states have internal predecessors, (21668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:29:04,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7144 states to 7144 states and 21668 transitions. [2021-06-12 22:29:04,827 INFO L78 Accepts]: Start accepts. Automaton has 7144 states and 21668 transitions. Word has length 48 [2021-06-12 22:29:04,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:29:04,827 INFO L482 AbstractCegarLoop]: Abstraction has 7144 states and 21668 transitions. [2021-06-12 22:29:04,827 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:29:04,827 INFO L276 IsEmpty]: Start isEmpty. Operand 7144 states and 21668 transitions. [2021-06-12 22:29:04,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-12 22:29:04,834 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:29:04,834 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:29:05,034 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable212 [2021-06-12 22:29:05,034 INFO L430 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:29:05,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:29:05,034 INFO L82 PathProgramCache]: Analyzing trace with hash 1776698066, now seen corresponding path program 124 times [2021-06-12 22:29:05,035 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:29:05,035 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664022605] [2021-06-12 22:29:05,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:29:05,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:29:05,466 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:29:05,466 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:29:05,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664022605] [2021-06-12 22:29:05,466 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [664022605] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:29:05,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [785964013] [2021-06-12 22:29:05,466 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:29:05,498 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:29:05,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:29:05,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-12 22:29:05,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:29:05,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:29:05,628 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:29:05,641 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:29:05,641 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:29:05,642 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-12 22:29:05,803 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-12 22:29:05,804 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:29:05,815 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:29:05,815 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:29:05,815 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:32 [2021-06-12 22:29:06,227 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:29:06,227 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [785964013] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:29:06,227 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:29:06,227 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-12 22:29:06,227 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738732341] [2021-06-12 22:29:06,227 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-12 22:29:06,227 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:29:06,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-12 22:29:06,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1370, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 22:29:06,228 INFO L87 Difference]: Start difference. First operand 7144 states and 21668 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:29:08,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:29:08,086 INFO L93 Difference]: Finished difference Result 9378 states and 28180 transitions. [2021-06-12 22:29:08,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-12 22:29:08,086 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-12 22:29:08,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:29:08,097 INFO L225 Difference]: With dead ends: 9378 [2021-06-12 22:29:08,097 INFO L226 Difference]: Without dead ends: 9335 [2021-06-12 22:29:08,097 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 812 ImplicationChecksByTransitivity, 1772.7ms TimeCoverageRelationStatistics Valid=235, Invalid=3071, Unknown=0, NotChecked=0, Total=3306 [2021-06-12 22:29:08,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9335 states. [2021-06-12 22:29:08,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9335 to 7136. [2021-06-12 22:29:08,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7136 states, 7135 states have (on average 3.0347582340574633) internal successors, (21653), 7135 states have internal predecessors, (21653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:29:08,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7136 states to 7136 states and 21653 transitions. [2021-06-12 22:29:08,190 INFO L78 Accepts]: Start accepts. Automaton has 7136 states and 21653 transitions. Word has length 48 [2021-06-12 22:29:08,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:29:08,190 INFO L482 AbstractCegarLoop]: Abstraction has 7136 states and 21653 transitions. [2021-06-12 22:29:08,190 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:29:08,191 INFO L276 IsEmpty]: Start isEmpty. Operand 7136 states and 21653 transitions. [2021-06-12 22:29:08,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-12 22:29:08,197 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:29:08,197 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:29:08,397 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 211 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable213 [2021-06-12 22:29:08,398 INFO L430 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:29:08,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:29:08,398 INFO L82 PathProgramCache]: Analyzing trace with hash 496784130, now seen corresponding path program 125 times [2021-06-12 22:29:08,398 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:29:08,398 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316370251] [2021-06-12 22:29:08,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:29:08,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:29:08,799 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:29:08,799 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:29:08,799 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316370251] [2021-06-12 22:29:08,800 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1316370251] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:29:08,800 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [876834381] [2021-06-12 22:29:08,800 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:29:08,832 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 22:29:08,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:29:08,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 44 conjunts are in the unsatisfiable core [2021-06-12 22:29:08,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:29:08,958 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:29:08,959 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:29:08,971 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:29:08,972 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:29:08,972 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-12 22:29:09,128 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:29:09,129 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:29:09,140 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:29:09,140 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:29:09,141 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-06-12 22:29:09,553 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:29:09,553 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [876834381] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:29:09,553 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:29:09,553 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-12 22:29:09,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014389635] [2021-06-12 22:29:09,553 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-12 22:29:09,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:29:09,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-12 22:29:09,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1372, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 22:29:09,554 INFO L87 Difference]: Start difference. First operand 7136 states and 21653 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:29:11,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:29:11,524 INFO L93 Difference]: Finished difference Result 8151 states and 24631 transitions. [2021-06-12 22:29:11,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-12 22:29:11,524 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-12 22:29:11,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:29:11,534 INFO L225 Difference]: With dead ends: 8151 [2021-06-12 22:29:11,534 INFO L226 Difference]: Without dead ends: 8098 [2021-06-12 22:29:11,535 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 849 ImplicationChecksByTransitivity, 2033.3ms TimeCoverageRelationStatistics Valid=274, Invalid=3266, Unknown=0, NotChecked=0, Total=3540 [2021-06-12 22:29:11,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8098 states. [2021-06-12 22:29:11,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8098 to 7148. [2021-06-12 22:29:11,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7148 states, 7147 states have (on average 3.0333006856023506) internal successors, (21679), 7147 states have internal predecessors, (21679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:29:11,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7148 states to 7148 states and 21679 transitions. [2021-06-12 22:29:11,618 INFO L78 Accepts]: Start accepts. Automaton has 7148 states and 21679 transitions. Word has length 48 [2021-06-12 22:29:11,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:29:11,618 INFO L482 AbstractCegarLoop]: Abstraction has 7148 states and 21679 transitions. [2021-06-12 22:29:11,618 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:29:11,618 INFO L276 IsEmpty]: Start isEmpty. Operand 7148 states and 21679 transitions. [2021-06-12 22:29:11,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-12 22:29:11,625 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:29:11,625 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:29:11,825 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 212 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable214 [2021-06-12 22:29:11,826 INFO L430 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:29:11,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:29:11,826 INFO L82 PathProgramCache]: Analyzing trace with hash -2034513236, now seen corresponding path program 126 times [2021-06-12 22:29:11,826 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:29:11,826 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470190843] [2021-06-12 22:29:11,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:29:11,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:29:12,226 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:29:12,226 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:29:12,226 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470190843] [2021-06-12 22:29:12,227 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470190843] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:29:12,227 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [78676845] [2021-06-12 22:29:12,227 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:29:12,259 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 22:29:12,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:29:12,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-12 22:29:12,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:29:12,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:29:12,390 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:29:12,402 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:29:12,402 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:29:12,403 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-12 22:29:12,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:29:12,561 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:29:12,572 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:29:12,573 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:29:12,573 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-06-12 22:29:13,014 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:29:13,015 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [78676845] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:29:13,015 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:29:13,015 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-12 22:29:13,015 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157480871] [2021-06-12 22:29:13,015 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-12 22:29:13,015 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:29:13,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-12 22:29:13,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1370, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 22:29:13,015 INFO L87 Difference]: Start difference. First operand 7148 states and 21679 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:29:14,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:29:14,802 INFO L93 Difference]: Finished difference Result 9386 states and 28199 transitions. [2021-06-12 22:29:14,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-12 22:29:14,802 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-12 22:29:14,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:29:14,813 INFO L225 Difference]: With dead ends: 9386 [2021-06-12 22:29:14,813 INFO L226 Difference]: Without dead ends: 9333 [2021-06-12 22:29:14,814 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 812 ImplicationChecksByTransitivity, 1774.0ms TimeCoverageRelationStatistics Valid=235, Invalid=3071, Unknown=0, NotChecked=0, Total=3306 [2021-06-12 22:29:14,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9333 states. [2021-06-12 22:29:14,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9333 to 7134. [2021-06-12 22:29:14,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7134 states, 7133 states have (on average 3.034908173279125) internal successors, (21648), 7133 states have internal predecessors, (21648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:29:14,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7134 states to 7134 states and 21648 transitions. [2021-06-12 22:29:14,907 INFO L78 Accepts]: Start accepts. Automaton has 7134 states and 21648 transitions. Word has length 48 [2021-06-12 22:29:14,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:29:14,907 INFO L482 AbstractCegarLoop]: Abstraction has 7134 states and 21648 transitions. [2021-06-12 22:29:14,907 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:29:14,907 INFO L276 IsEmpty]: Start isEmpty. Operand 7134 states and 21648 transitions. [2021-06-12 22:29:14,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-12 22:29:14,914 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:29:14,914 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:29:15,114 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable215,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:29:15,114 INFO L430 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:29:15,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:29:15,115 INFO L82 PathProgramCache]: Analyzing trace with hash 1714755808, now seen corresponding path program 127 times [2021-06-12 22:29:15,115 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:29:15,115 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129057035] [2021-06-12 22:29:15,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:29:15,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:29:15,545 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:29:15,546 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:29:15,546 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129057035] [2021-06-12 22:29:15,546 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129057035] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:29:15,546 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1353579746] [2021-06-12 22:29:15,546 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:29:15,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:29:15,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-12 22:29:15,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:29:15,703 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:29:15,704 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:29:15,716 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:29:15,717 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:29:15,717 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-12 22:29:15,874 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-12 22:29:15,874 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:29:15,885 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:29:15,886 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:29:15,886 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:32 [2021-06-12 22:29:16,304 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:29:16,305 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1353579746] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:29:16,305 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:29:16,305 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-12 22:29:16,305 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132463990] [2021-06-12 22:29:16,305 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-12 22:29:16,305 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:29:16,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-12 22:29:16,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1372, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 22:29:16,305 INFO L87 Difference]: Start difference. First operand 7134 states and 21648 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:29:18,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:29:18,357 INFO L93 Difference]: Finished difference Result 8124 states and 24566 transitions. [2021-06-12 22:29:18,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-12 22:29:18,357 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-12 22:29:18,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:29:18,369 INFO L225 Difference]: With dead ends: 8124 [2021-06-12 22:29:18,369 INFO L226 Difference]: Without dead ends: 8084 [2021-06-12 22:29:18,369 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 849 ImplicationChecksByTransitivity, 2018.3ms TimeCoverageRelationStatistics Valid=274, Invalid=3266, Unknown=0, NotChecked=0, Total=3540 [2021-06-12 22:29:18,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8084 states. [2021-06-12 22:29:18,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8084 to 7138. [2021-06-12 22:29:18,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7138 states, 7137 states have (on average 3.034188034188034) internal successors, (21655), 7137 states have internal predecessors, (21655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:29:18,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7138 states to 7138 states and 21655 transitions. [2021-06-12 22:29:18,470 INFO L78 Accepts]: Start accepts. Automaton has 7138 states and 21655 transitions. Word has length 48 [2021-06-12 22:29:18,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:29:18,470 INFO L482 AbstractCegarLoop]: Abstraction has 7138 states and 21655 transitions. [2021-06-12 22:29:18,470 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:29:18,470 INFO L276 IsEmpty]: Start isEmpty. Operand 7138 states and 21655 transitions. [2021-06-12 22:29:18,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-12 22:29:18,478 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:29:18,478 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:29:18,678 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 214 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable216 [2021-06-12 22:29:18,679 INFO L430 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:29:18,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:29:18,679 INFO L82 PathProgramCache]: Analyzing trace with hash 838573344, now seen corresponding path program 128 times [2021-06-12 22:29:18,679 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:29:18,679 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172907823] [2021-06-12 22:29:18,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:29:18,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:29:19,076 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:29:19,077 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:29:19,077 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172907823] [2021-06-12 22:29:19,077 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [172907823] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:29:19,077 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2118838496] [2021-06-12 22:29:19,077 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:29:19,237 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:29:19,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:29:19,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-12 22:29:19,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:29:19,365 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:29:19,366 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:29:19,378 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:29:19,379 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:29:19,379 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-12 22:29:19,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:29:19,539 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:29:19,550 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:29:19,551 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:29:19,551 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-06-12 22:29:19,967 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:29:19,967 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2118838496] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:29:19,967 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:29:19,968 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-12 22:29:19,968 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995207704] [2021-06-12 22:29:19,968 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-12 22:29:19,968 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:29:19,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-12 22:29:19,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1370, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 22:29:19,968 INFO L87 Difference]: Start difference. First operand 7138 states and 21655 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:29:21,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:29:21,711 INFO L93 Difference]: Finished difference Result 9372 states and 28167 transitions. [2021-06-12 22:29:21,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-12 22:29:21,711 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-12 22:29:21,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:29:21,725 INFO L225 Difference]: With dead ends: 9372 [2021-06-12 22:29:21,725 INFO L226 Difference]: Without dead ends: 9325 [2021-06-12 22:29:21,725 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 812 ImplicationChecksByTransitivity, 1766.0ms TimeCoverageRelationStatistics Valid=235, Invalid=3071, Unknown=0, NotChecked=0, Total=3306 [2021-06-12 22:29:21,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9325 states. [2021-06-12 22:29:21,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9325 to 7126. [2021-06-12 22:29:21,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7126 states, 7125 states have (on average 3.0362105263157897) internal successors, (21633), 7125 states have internal predecessors, (21633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:29:21,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7126 states to 7126 states and 21633 transitions. [2021-06-12 22:29:21,842 INFO L78 Accepts]: Start accepts. Automaton has 7126 states and 21633 transitions. Word has length 48 [2021-06-12 22:29:21,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:29:21,842 INFO L482 AbstractCegarLoop]: Abstraction has 7126 states and 21633 transitions. [2021-06-12 22:29:21,842 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:29:21,842 INFO L276 IsEmpty]: Start isEmpty. Operand 7126 states and 21633 transitions. [2021-06-12 22:29:21,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-12 22:29:21,851 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:29:21,851 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:29:22,051 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable217,215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:29:22,051 INFO L430 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:29:22,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:29:22,051 INFO L82 PathProgramCache]: Analyzing trace with hash -1586885058, now seen corresponding path program 129 times [2021-06-12 22:29:22,051 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:29:22,051 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88649357] [2021-06-12 22:29:22,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:29:22,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:29:22,458 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:29:22,458 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:29:22,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88649357] [2021-06-12 22:29:22,458 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [88649357] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:29:22,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1075622562] [2021-06-12 22:29:22,458 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:29:22,490 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 22:29:22,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:29:22,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-12 22:29:22,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:29:22,619 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-12 22:29:22,619 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:29:22,632 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:29:22,632 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:29:22,632 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:31 [2021-06-12 22:29:22,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:29:22,829 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:29:22,839 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:29:22,840 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:29:22,840 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-06-12 22:29:23,260 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:29:23,260 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1075622562] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:29:23,260 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:29:23,260 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-12 22:29:23,260 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413251368] [2021-06-12 22:29:23,261 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-12 22:29:23,261 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:29:23,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-12 22:29:23,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1372, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 22:29:23,261 INFO L87 Difference]: Start difference. First operand 7126 states and 21633 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:29:25,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:29:25,471 INFO L93 Difference]: Finished difference Result 8122 states and 24564 transitions. [2021-06-12 22:29:25,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-12 22:29:25,472 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-12 22:29:25,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:29:25,481 INFO L225 Difference]: With dead ends: 8122 [2021-06-12 22:29:25,481 INFO L226 Difference]: Without dead ends: 8082 [2021-06-12 22:29:25,482 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 849 ImplicationChecksByTransitivity, 2077.1ms TimeCoverageRelationStatistics Valid=274, Invalid=3266, Unknown=0, NotChecked=0, Total=3540 [2021-06-12 22:29:25,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8082 states. [2021-06-12 22:29:25,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8082 to 7132. [2021-06-12 22:29:25,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7132 states, 7131 states have (on average 3.035478894965643) internal successors, (21646), 7131 states have internal predecessors, (21646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:29:25,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7132 states to 7132 states and 21646 transitions. [2021-06-12 22:29:25,569 INFO L78 Accepts]: Start accepts. Automaton has 7132 states and 21646 transitions. Word has length 48 [2021-06-12 22:29:25,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:29:25,569 INFO L482 AbstractCegarLoop]: Abstraction has 7132 states and 21646 transitions. [2021-06-12 22:29:25,569 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:29:25,569 INFO L276 IsEmpty]: Start isEmpty. Operand 7132 states and 21646 transitions. [2021-06-12 22:29:25,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-12 22:29:25,577 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:29:25,577 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:29:25,777 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable218,216 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:29:25,777 INFO L430 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:29:25,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:29:25,777 INFO L82 PathProgramCache]: Analyzing trace with hash 176784872, now seen corresponding path program 130 times [2021-06-12 22:29:25,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:29:25,777 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448804016] [2021-06-12 22:29:25,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:29:25,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:29:26,179 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:29:26,179 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:29:26,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448804016] [2021-06-12 22:29:26,179 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [448804016] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:29:26,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [633592970] [2021-06-12 22:29:26,179 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:29:26,211 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:29:26,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:29:26,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-12 22:29:26,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:29:26,339 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:29:26,340 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:29:26,352 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:29:26,353 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:29:26,353 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-12 22:29:26,510 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-12 22:29:26,511 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:29:26,522 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:29:26,523 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:29:26,523 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:32 [2021-06-12 22:29:26,929 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:29:26,929 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [633592970] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:29:26,929 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:29:26,930 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-12 22:29:26,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124240158] [2021-06-12 22:29:26,930 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-12 22:29:26,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:29:26,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-12 22:29:26,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1370, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 22:29:26,930 INFO L87 Difference]: Start difference. First operand 7132 states and 21646 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:29:28,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:29:28,726 INFO L93 Difference]: Finished difference Result 9370 states and 28166 transitions. [2021-06-12 22:29:28,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-12 22:29:28,726 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-12 22:29:28,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:29:28,738 INFO L225 Difference]: With dead ends: 9370 [2021-06-12 22:29:28,738 INFO L226 Difference]: Without dead ends: 9282 [2021-06-12 22:29:28,738 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 812 ImplicationChecksByTransitivity, 1761.3ms TimeCoverageRelationStatistics Valid=235, Invalid=3071, Unknown=0, NotChecked=0, Total=3306 [2021-06-12 22:29:28,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9282 states. [2021-06-12 22:29:28,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9282 to 7083. [2021-06-12 22:29:28,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7083 states, 7082 states have (on average 3.0417961027958205) internal successors, (21542), 7082 states have internal predecessors, (21542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:29:28,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7083 states to 7083 states and 21542 transitions. [2021-06-12 22:29:28,847 INFO L78 Accepts]: Start accepts. Automaton has 7083 states and 21542 transitions. Word has length 48 [2021-06-12 22:29:28,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:29:28,847 INFO L482 AbstractCegarLoop]: Abstraction has 7083 states and 21542 transitions. [2021-06-12 22:29:28,847 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:29:28,847 INFO L276 IsEmpty]: Start isEmpty. Operand 7083 states and 21542 transitions. [2021-06-12 22:29:28,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-12 22:29:28,853 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:29:28,853 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:29:29,054 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable219 [2021-06-12 22:29:29,054 INFO L430 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:29:29,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:29:29,054 INFO L82 PathProgramCache]: Analyzing trace with hash -1824475134, now seen corresponding path program 131 times [2021-06-12 22:29:29,054 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:29:29,054 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374148628] [2021-06-12 22:29:29,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:29:29,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:29:29,454 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:29:29,454 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:29:29,454 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374148628] [2021-06-12 22:29:29,454 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [374148628] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:29:29,454 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1088056679] [2021-06-12 22:29:29,454 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:29:29,489 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 22:29:29,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:29:29,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-12 22:29:29,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:29:29,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:29:29,616 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:29:29,628 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:29:29,629 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:29:29,629 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-12 22:29:29,786 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:29:29,786 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:29:29,797 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:29:29,798 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:29:29,798 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-06-12 22:29:30,239 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:29:30,239 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1088056679] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:29:30,239 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:29:30,239 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-12 22:29:30,239 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615308183] [2021-06-12 22:29:30,239 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-12 22:29:30,239 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:29:30,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-12 22:29:30,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1370, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 22:29:30,240 INFO L87 Difference]: Start difference. First operand 7083 states and 21542 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:29:32,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:29:32,047 INFO L93 Difference]: Finished difference Result 9433 states and 28339 transitions. [2021-06-12 22:29:32,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-12 22:29:32,047 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-12 22:29:32,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:29:32,059 INFO L225 Difference]: With dead ends: 9433 [2021-06-12 22:29:32,059 INFO L226 Difference]: Without dead ends: 9315 [2021-06-12 22:29:32,060 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 846 ImplicationChecksByTransitivity, 1816.1ms TimeCoverageRelationStatistics Valid=241, Invalid=3181, Unknown=0, NotChecked=0, Total=3422 [2021-06-12 22:29:32,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9315 states. [2021-06-12 22:29:32,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9315 to 7103. [2021-06-12 22:29:32,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7103 states, 7102 states have (on average 3.0387214869050974) internal successors, (21581), 7102 states have internal predecessors, (21581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:29:32,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7103 states to 7103 states and 21581 transitions. [2021-06-12 22:29:32,161 INFO L78 Accepts]: Start accepts. Automaton has 7103 states and 21581 transitions. Word has length 48 [2021-06-12 22:29:32,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:29:32,161 INFO L482 AbstractCegarLoop]: Abstraction has 7103 states and 21581 transitions. [2021-06-12 22:29:32,161 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:29:32,162 INFO L276 IsEmpty]: Start isEmpty. Operand 7103 states and 21581 transitions. [2021-06-12 22:29:32,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-12 22:29:32,169 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:29:32,169 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:29:32,369 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable220,218 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:29:32,369 INFO L430 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:29:32,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:29:32,369 INFO L82 PathProgramCache]: Analyzing trace with hash -1717024766, now seen corresponding path program 132 times [2021-06-12 22:29:32,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:29:32,370 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054946755] [2021-06-12 22:29:32,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:29:32,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:29:32,814 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:29:32,814 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:29:32,814 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054946755] [2021-06-12 22:29:32,814 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1054946755] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:29:32,814 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [979642090] [2021-06-12 22:29:32,814 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:29:32,847 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 22:29:32,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:29:32,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-12 22:29:32,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:29:32,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:29:32,978 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:29:32,990 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:29:32,991 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:29:32,991 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-12 22:29:33,151 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:29:33,152 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:29:33,163 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:29:33,164 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:29:33,164 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-06-12 22:29:33,629 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:29:33,629 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [979642090] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:29:33,629 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:29:33,629 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 40 [2021-06-12 22:29:33,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789656716] [2021-06-12 22:29:33,629 INFO L462 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-06-12 22:29:33,629 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:29:33,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-06-12 22:29:33,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1525, Unknown=0, NotChecked=0, Total=1640 [2021-06-12 22:29:33,629 INFO L87 Difference]: Start difference. First operand 7103 states and 21581 transitions. Second operand has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:29:35,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:29:35,728 INFO L93 Difference]: Finished difference Result 8101 states and 24521 transitions. [2021-06-12 22:29:35,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-12 22:29:35,728 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-12 22:29:35,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:29:35,739 INFO L225 Difference]: With dead ends: 8101 [2021-06-12 22:29:35,739 INFO L226 Difference]: Without dead ends: 8061 [2021-06-12 22:29:35,739 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 894 ImplicationChecksByTransitivity, 2126.1ms TimeCoverageRelationStatistics Valid=274, Invalid=3508, Unknown=0, NotChecked=0, Total=3782 [2021-06-12 22:29:35,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8061 states. [2021-06-12 22:29:35,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8061 to 7115. [2021-06-12 22:29:35,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7115 states, 7114 states have (on average 3.037672195670509) internal successors, (21610), 7114 states have internal predecessors, (21610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:29:35,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7115 states to 7115 states and 21610 transitions. [2021-06-12 22:29:35,830 INFO L78 Accepts]: Start accepts. Automaton has 7115 states and 21610 transitions. Word has length 48 [2021-06-12 22:29:35,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:29:35,830 INFO L482 AbstractCegarLoop]: Abstraction has 7115 states and 21610 transitions. [2021-06-12 22:29:35,830 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:29:35,831 INFO L276 IsEmpty]: Start isEmpty. Operand 7115 states and 21610 transitions. [2021-06-12 22:29:35,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-12 22:29:35,838 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:29:35,838 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:29:36,038 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable221 [2021-06-12 22:29:36,038 INFO L430 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:29:36,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:29:36,038 INFO L82 PathProgramCache]: Analyzing trace with hash 1701760066, now seen corresponding path program 133 times [2021-06-12 22:29:36,039 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:29:36,039 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695999342] [2021-06-12 22:29:36,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:29:36,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:29:36,439 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:29:36,439 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:29:36,439 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695999342] [2021-06-12 22:29:36,439 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1695999342] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:29:36,439 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [705498424] [2021-06-12 22:29:36,439 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:29:36,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:29:36,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-12 22:29:36,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:29:36,603 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:29:36,604 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:29:36,618 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:29:36,618 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:29:36,619 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-12 22:29:36,781 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:29:36,782 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:29:36,793 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:29:36,793 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:29:36,793 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-06-12 22:29:37,247 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:29:37,247 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [705498424] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:29:37,248 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:29:37,248 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 40 [2021-06-12 22:29:37,248 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765662693] [2021-06-12 22:29:37,248 INFO L462 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-06-12 22:29:37,248 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:29:37,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-06-12 22:29:37,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1523, Unknown=0, NotChecked=0, Total=1640 [2021-06-12 22:29:37,248 INFO L87 Difference]: Start difference. First operand 7115 states and 21610 transitions. Second operand has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:29:39,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:29:39,006 INFO L93 Difference]: Finished difference Result 9362 states and 28153 transitions. [2021-06-12 22:29:39,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-12 22:29:39,006 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-12 22:29:39,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:29:39,018 INFO L225 Difference]: With dead ends: 9362 [2021-06-12 22:29:39,019 INFO L226 Difference]: Without dead ends: 9323 [2021-06-12 22:29:39,019 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 855 ImplicationChecksByTransitivity, 1852.9ms TimeCoverageRelationStatistics Valid=239, Invalid=3301, Unknown=0, NotChecked=0, Total=3540 [2021-06-12 22:29:39,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9323 states. [2021-06-12 22:29:39,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9323 to 7111. [2021-06-12 22:29:39,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7111 states, 7110 states have (on average 3.037834036568214) internal successors, (21599), 7110 states have internal predecessors, (21599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:29:39,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7111 states to 7111 states and 21599 transitions. [2021-06-12 22:29:39,113 INFO L78 Accepts]: Start accepts. Automaton has 7111 states and 21599 transitions. Word has length 48 [2021-06-12 22:29:39,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:29:39,113 INFO L482 AbstractCegarLoop]: Abstraction has 7111 states and 21599 transitions. [2021-06-12 22:29:39,113 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:29:39,113 INFO L276 IsEmpty]: Start isEmpty. Operand 7111 states and 21599 transitions. [2021-06-12 22:29:39,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-12 22:29:39,120 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:29:39,120 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:29:39,320 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 220 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable222 [2021-06-12 22:29:39,320 INFO L430 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:29:39,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:29:39,321 INFO L82 PathProgramCache]: Analyzing trace with hash 1843475206, now seen corresponding path program 134 times [2021-06-12 22:29:39,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:29:39,321 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941522845] [2021-06-12 22:29:39,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:29:39,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:29:39,727 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:29:39,728 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:29:39,728 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941522845] [2021-06-12 22:29:39,728 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1941522845] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:29:39,728 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [309013068] [2021-06-12 22:29:39,728 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:29:39,760 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:29:39,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:29:39,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-12 22:29:39,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:29:39,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:29:39,891 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:29:39,903 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:29:39,904 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:29:39,904 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-12 22:29:40,066 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:29:40,067 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:29:40,114 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:29:40,115 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:29:40,115 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-06-12 22:29:40,570 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:29:40,570 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [309013068] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:29:40,570 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:29:40,571 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 40 [2021-06-12 22:29:40,571 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446400823] [2021-06-12 22:29:40,571 INFO L462 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-06-12 22:29:40,571 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:29:40,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-06-12 22:29:40,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1523, Unknown=0, NotChecked=0, Total=1640 [2021-06-12 22:29:40,571 INFO L87 Difference]: Start difference. First operand 7111 states and 21599 transitions. Second operand has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:29:42,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:29:42,148 INFO L93 Difference]: Finished difference Result 9376 states and 28186 transitions. [2021-06-12 22:29:42,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-12 22:29:42,149 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-12 22:29:42,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:29:42,162 INFO L225 Difference]: With dead ends: 9376 [2021-06-12 22:29:42,162 INFO L226 Difference]: Without dead ends: 9319 [2021-06-12 22:29:42,162 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 854 ImplicationChecksByTransitivity, 1826.4ms TimeCoverageRelationStatistics Valid=239, Invalid=3301, Unknown=0, NotChecked=0, Total=3540 [2021-06-12 22:29:42,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9319 states. [2021-06-12 22:29:42,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9319 to 7107. [2021-06-12 22:29:42,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7107 states, 7106 states have (on average 3.0379960596678863) internal successors, (21588), 7106 states have internal predecessors, (21588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:29:42,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7107 states to 7107 states and 21588 transitions. [2021-06-12 22:29:42,266 INFO L78 Accepts]: Start accepts. Automaton has 7107 states and 21588 transitions. Word has length 48 [2021-06-12 22:29:42,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:29:42,267 INFO L482 AbstractCegarLoop]: Abstraction has 7107 states and 21588 transitions. [2021-06-12 22:29:42,267 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:29:42,267 INFO L276 IsEmpty]: Start isEmpty. Operand 7107 states and 21588 transitions. [2021-06-12 22:29:42,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-12 22:29:42,274 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:29:42,274 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:29:42,475 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable223,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:29:42,475 INFO L430 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:29:42,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:29:42,476 INFO L82 PathProgramCache]: Analyzing trace with hash 560327746, now seen corresponding path program 135 times [2021-06-12 22:29:42,476 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:29:42,476 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415586060] [2021-06-12 22:29:42,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:29:42,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:29:42,920 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:29:42,921 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:29:42,921 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415586060] [2021-06-12 22:29:42,921 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [415586060] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:29:42,921 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [24887065] [2021-06-12 22:29:42,921 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:29:42,953 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 22:29:42,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:29:42,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-12 22:29:42,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:29:43,082 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:29:43,083 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:29:43,095 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:29:43,096 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:29:43,096 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-12 22:29:43,263 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-12 22:29:43,264 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:29:43,275 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:29:43,275 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:29:43,275 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:32 [2021-06-12 22:29:43,729 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:29:43,730 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [24887065] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:29:43,730 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:29:43,730 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 40 [2021-06-12 22:29:43,730 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394810209] [2021-06-12 22:29:43,730 INFO L462 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-06-12 22:29:43,730 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:29:43,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-06-12 22:29:43,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=1521, Unknown=0, NotChecked=0, Total=1640 [2021-06-12 22:29:43,730 INFO L87 Difference]: Start difference. First operand 7107 states and 21588 transitions. Second operand has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:29:45,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:29:45,500 INFO L93 Difference]: Finished difference Result 9389 states and 28218 transitions. [2021-06-12 22:29:45,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-12 22:29:45,501 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-12 22:29:45,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:29:45,512 INFO L225 Difference]: With dead ends: 9389 [2021-06-12 22:29:45,512 INFO L226 Difference]: Without dead ends: 9303 [2021-06-12 22:29:45,512 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 875 ImplicationChecksByTransitivity, 1887.8ms TimeCoverageRelationStatistics Valid=242, Invalid=3298, Unknown=0, NotChecked=0, Total=3540 [2021-06-12 22:29:45,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9303 states. [2021-06-12 22:29:45,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9303 to 7087. [2021-06-12 22:29:45,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7087 states, 7086 states have (on average 3.0410668924640136) internal successors, (21549), 7086 states have internal predecessors, (21549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:29:45,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7087 states to 7087 states and 21549 transitions. [2021-06-12 22:29:45,610 INFO L78 Accepts]: Start accepts. Automaton has 7087 states and 21549 transitions. Word has length 48 [2021-06-12 22:29:45,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:29:45,610 INFO L482 AbstractCegarLoop]: Abstraction has 7087 states and 21549 transitions. [2021-06-12 22:29:45,610 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:29:45,610 INFO L276 IsEmpty]: Start isEmpty. Operand 7087 states and 21549 transitions. [2021-06-12 22:29:45,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-12 22:29:45,617 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:29:45,618 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:29:45,818 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 222 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable224 [2021-06-12 22:29:45,818 INFO L430 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:29:45,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:29:45,818 INFO L82 PathProgramCache]: Analyzing trace with hash -181794614, now seen corresponding path program 136 times [2021-06-12 22:29:45,818 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:29:45,818 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814511445] [2021-06-12 22:29:45,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:29:45,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:29:46,211 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:29:46,211 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:29:46,211 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814511445] [2021-06-12 22:29:46,211 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1814511445] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:29:46,211 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [707467917] [2021-06-12 22:29:46,211 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:29:46,243 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:29:46,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:29:46,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-12 22:29:46,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:29:46,368 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:29:46,369 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:29:46,381 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:29:46,382 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:29:46,382 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-12 22:29:46,539 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:29:46,540 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:29:46,551 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:29:46,551 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:29:46,551 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-06-12 22:29:46,953 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:29:46,953 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [707467917] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:29:46,953 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:29:46,953 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-12 22:29:46,953 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866296146] [2021-06-12 22:29:46,954 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-12 22:29:46,954 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:29:46,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-12 22:29:46,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1370, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 22:29:46,954 INFO L87 Difference]: Start difference. First operand 7087 states and 21549 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:29:48,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:29:48,874 INFO L93 Difference]: Finished difference Result 9417 states and 28291 transitions. [2021-06-12 22:29:48,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-12 22:29:48,875 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-12 22:29:48,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:29:48,886 INFO L225 Difference]: With dead ends: 9417 [2021-06-12 22:29:48,886 INFO L226 Difference]: Without dead ends: 9282 [2021-06-12 22:29:48,887 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 846 ImplicationChecksByTransitivity, 1774.8ms TimeCoverageRelationStatistics Valid=241, Invalid=3181, Unknown=0, NotChecked=0, Total=3422 [2021-06-12 22:29:48,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9282 states. [2021-06-12 22:29:48,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9282 to 7083. [2021-06-12 22:29:48,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7083 states, 7082 states have (on average 3.0416548997458346) internal successors, (21541), 7082 states have internal predecessors, (21541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:29:48,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7083 states to 7083 states and 21541 transitions. [2021-06-12 22:29:48,993 INFO L78 Accepts]: Start accepts. Automaton has 7083 states and 21541 transitions. Word has length 48 [2021-06-12 22:29:48,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:29:48,993 INFO L482 AbstractCegarLoop]: Abstraction has 7083 states and 21541 transitions. [2021-06-12 22:29:48,993 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:29:48,993 INFO L276 IsEmpty]: Start isEmpty. Operand 7083 states and 21541 transitions. [2021-06-12 22:29:49,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-12 22:29:49,001 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:29:49,001 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:29:49,202 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable225,223 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:29:49,202 INFO L430 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:29:49,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:29:49,202 INFO L82 PathProgramCache]: Analyzing trace with hash -1908999990, now seen corresponding path program 137 times [2021-06-12 22:29:49,202 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:29:49,202 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000027647] [2021-06-12 22:29:49,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:29:49,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:29:49,600 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:29:49,600 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:29:49,600 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000027647] [2021-06-12 22:29:49,600 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2000027647] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:29:49,600 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [384513482] [2021-06-12 22:29:49,600 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:29:49,634 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 22:29:49,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:29:49,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-12 22:29:49,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:29:49,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:29:49,762 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:29:49,774 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:29:49,775 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:29:49,775 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-12 22:29:49,970 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:29:49,971 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:29:49,987 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:29:49,987 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:29:49,988 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-06-12 22:29:50,394 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:29:50,394 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [384513482] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:29:50,395 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:29:50,395 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-12 22:29:50,395 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136293747] [2021-06-12 22:29:50,395 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-12 22:29:50,395 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:29:50,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-12 22:29:50,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1370, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 22:29:50,395 INFO L87 Difference]: Start difference. First operand 7083 states and 21541 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:29:52,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:29:52,228 INFO L93 Difference]: Finished difference Result 9491 states and 28479 transitions. [2021-06-12 22:29:52,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-12 22:29:52,228 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-12 22:29:52,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:29:52,242 INFO L225 Difference]: With dead ends: 9491 [2021-06-12 22:29:52,242 INFO L226 Difference]: Without dead ends: 9373 [2021-06-12 22:29:52,242 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 846 ImplicationChecksByTransitivity, 1826.4ms TimeCoverageRelationStatistics Valid=241, Invalid=3181, Unknown=0, NotChecked=0, Total=3422 [2021-06-12 22:29:52,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9373 states. [2021-06-12 22:29:52,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9373 to 7161. [2021-06-12 22:29:52,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7161 states, 7160 states have (on average 3.034217877094972) internal successors, (21725), 7160 states have internal predecessors, (21725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:29:52,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7161 states to 7161 states and 21725 transitions. [2021-06-12 22:29:52,367 INFO L78 Accepts]: Start accepts. Automaton has 7161 states and 21725 transitions. Word has length 48 [2021-06-12 22:29:52,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:29:52,367 INFO L482 AbstractCegarLoop]: Abstraction has 7161 states and 21725 transitions. [2021-06-12 22:29:52,367 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:29:52,367 INFO L276 IsEmpty]: Start isEmpty. Operand 7161 states and 21725 transitions. [2021-06-12 22:29:52,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-12 22:29:52,375 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:29:52,375 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:29:52,575 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 224 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable226 [2021-06-12 22:29:52,575 INFO L430 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:29:52,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:29:52,576 INFO L82 PathProgramCache]: Analyzing trace with hash 1004530388, now seen corresponding path program 138 times [2021-06-12 22:29:52,576 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:29:52,576 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378113304] [2021-06-12 22:29:52,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:29:52,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:29:52,988 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:29:52,989 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:29:52,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378113304] [2021-06-12 22:29:52,989 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378113304] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:29:52,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [269768191] [2021-06-12 22:29:52,989 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:29:53,021 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 22:29:53,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:29:53,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-12 22:29:53,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:29:53,152 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:29:53,153 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:29:53,165 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:29:53,166 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:29:53,166 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-12 22:29:53,327 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:29:53,327 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:29:53,338 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:29:53,339 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:29:53,339 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-06-12 22:29:53,804 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:29:53,804 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [269768191] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:29:53,804 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:29:53,804 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 40 [2021-06-12 22:29:53,804 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355934658] [2021-06-12 22:29:53,804 INFO L462 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-06-12 22:29:53,804 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:29:53,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-06-12 22:29:53,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=1526, Unknown=0, NotChecked=0, Total=1640 [2021-06-12 22:29:53,805 INFO L87 Difference]: Start difference. First operand 7161 states and 21725 transitions. Second operand has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:29:55,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:29:55,891 INFO L93 Difference]: Finished difference Result 8169 states and 24688 transitions. [2021-06-12 22:29:55,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-12 22:29:55,891 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-12 22:29:55,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:29:55,901 INFO L225 Difference]: With dead ends: 8169 [2021-06-12 22:29:55,902 INFO L226 Difference]: Without dead ends: 8129 [2021-06-12 22:29:55,902 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 920 ImplicationChecksByTransitivity, 2192.4ms TimeCoverageRelationStatistics Valid=281, Invalid=3625, Unknown=0, NotChecked=0, Total=3906 [2021-06-12 22:29:55,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8129 states. [2021-06-12 22:29:55,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8129 to 7179. [2021-06-12 22:29:55,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7179 states, 7178 states have (on average 3.0328782390638063) internal successors, (21770), 7178 states have internal predecessors, (21770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:29:55,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7179 states to 7179 states and 21770 transitions. [2021-06-12 22:29:55,987 INFO L78 Accepts]: Start accepts. Automaton has 7179 states and 21770 transitions. Word has length 48 [2021-06-12 22:29:55,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:29:55,987 INFO L482 AbstractCegarLoop]: Abstraction has 7179 states and 21770 transitions. [2021-06-12 22:29:55,988 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:29:55,988 INFO L276 IsEmpty]: Start isEmpty. Operand 7179 states and 21770 transitions. [2021-06-12 22:29:55,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-12 22:29:55,995 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:29:55,995 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:29:56,195 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable227,225 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:29:56,195 INFO L430 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:29:56,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:29:56,195 INFO L82 PathProgramCache]: Analyzing trace with hash 775771544, now seen corresponding path program 139 times [2021-06-12 22:29:56,196 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:29:56,196 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663402542] [2021-06-12 22:29:56,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:29:56,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:29:56,608 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:29:56,608 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:29:56,608 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663402542] [2021-06-12 22:29:56,608 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [663402542] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:29:56,608 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1911723022] [2021-06-12 22:29:56,608 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:29:56,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:29:56,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-12 22:29:56,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:29:56,769 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:29:56,770 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:29:56,783 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:29:56,783 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:29:56,783 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-12 22:29:56,945 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:29:56,946 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:29:56,957 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:29:56,958 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:29:56,958 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-06-12 22:29:57,467 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:29:57,467 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1911723022] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:29:57,467 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:29:57,467 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 40 [2021-06-12 22:29:57,467 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421577012] [2021-06-12 22:29:57,468 INFO L462 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-06-12 22:29:57,468 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:29:57,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-06-12 22:29:57,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1523, Unknown=0, NotChecked=0, Total=1640 [2021-06-12 22:29:57,468 INFO L87 Difference]: Start difference. First operand 7179 states and 21770 transitions. Second operand has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:29:59,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:29:59,240 INFO L93 Difference]: Finished difference Result 9430 states and 28321 transitions. [2021-06-12 22:29:59,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-12 22:29:59,240 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-12 22:29:59,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:29:59,252 INFO L225 Difference]: With dead ends: 9430 [2021-06-12 22:29:59,252 INFO L226 Difference]: Without dead ends: 9385 [2021-06-12 22:29:59,253 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 855 ImplicationChecksByTransitivity, 1891.9ms TimeCoverageRelationStatistics Valid=239, Invalid=3301, Unknown=0, NotChecked=0, Total=3540 [2021-06-12 22:29:59,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9385 states. [2021-06-12 22:29:59,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9385 to 7173. [2021-06-12 22:29:59,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7173 states, 7172 states have (on average 3.03276631344116) internal successors, (21751), 7172 states have internal predecessors, (21751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:29:59,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7173 states to 7173 states and 21751 transitions. [2021-06-12 22:29:59,352 INFO L78 Accepts]: Start accepts. Automaton has 7173 states and 21751 transitions. Word has length 48 [2021-06-12 22:29:59,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:29:59,352 INFO L482 AbstractCegarLoop]: Abstraction has 7173 states and 21751 transitions. [2021-06-12 22:29:59,352 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:29:59,352 INFO L276 IsEmpty]: Start isEmpty. Operand 7173 states and 21751 transitions. [2021-06-12 22:29:59,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-12 22:29:59,359 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:29:59,359 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:29:59,560 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 226 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable228 [2021-06-12 22:29:59,560 INFO L430 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:29:59,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:29:59,560 INFO L82 PathProgramCache]: Analyzing trace with hash -170960256, now seen corresponding path program 140 times [2021-06-12 22:29:59,560 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:29:59,560 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513300310] [2021-06-12 22:29:59,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:29:59,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:30:00,014 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:30:00,015 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:30:00,015 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513300310] [2021-06-12 22:30:00,015 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1513300310] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:30:00,015 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438679498] [2021-06-12 22:30:00,015 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:30:00,046 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:30:00,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:30:00,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-12 22:30:00,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:30:00,177 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:30:00,178 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:30:00,190 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:30:00,190 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:30:00,190 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-12 22:30:00,370 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:30:00,371 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:30:00,385 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:30:00,386 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:30:00,386 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-06-12 22:30:00,878 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:30:00,878 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1438679498] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:30:00,878 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:30:00,878 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 40 [2021-06-12 22:30:00,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221950714] [2021-06-12 22:30:00,878 INFO L462 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-06-12 22:30:00,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:30:00,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-06-12 22:30:00,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1523, Unknown=0, NotChecked=0, Total=1640 [2021-06-12 22:30:00,879 INFO L87 Difference]: Start difference. First operand 7173 states and 21751 transitions. Second operand has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:30:02,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:30:02,990 INFO L93 Difference]: Finished difference Result 9438 states and 28338 transitions. [2021-06-12 22:30:02,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-12 22:30:02,991 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-12 22:30:02,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:30:03,003 INFO L225 Difference]: With dead ends: 9438 [2021-06-12 22:30:03,003 INFO L226 Difference]: Without dead ends: 9379 [2021-06-12 22:30:03,003 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 854 ImplicationChecksByTransitivity, 1949.1ms TimeCoverageRelationStatistics Valid=239, Invalid=3301, Unknown=0, NotChecked=0, Total=3540 [2021-06-12 22:30:03,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9379 states. [2021-06-12 22:30:03,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9379 to 7167. [2021-06-12 22:30:03,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7167 states, 7166 states have (on average 3.033072843985487) internal successors, (21735), 7166 states have internal predecessors, (21735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:30:03,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7167 states to 7167 states and 21735 transitions. [2021-06-12 22:30:03,107 INFO L78 Accepts]: Start accepts. Automaton has 7167 states and 21735 transitions. Word has length 48 [2021-06-12 22:30:03,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:30:03,107 INFO L482 AbstractCegarLoop]: Abstraction has 7167 states and 21735 transitions. [2021-06-12 22:30:03,107 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:30:03,107 INFO L276 IsEmpty]: Start isEmpty. Operand 7167 states and 21735 transitions. [2021-06-12 22:30:03,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-12 22:30:03,115 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:30:03,115 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:30:03,315 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable229,227 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:30:03,315 INFO L430 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:30:03,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:30:03,316 INFO L82 PathProgramCache]: Analyzing trace with hash -325397774, now seen corresponding path program 141 times [2021-06-12 22:30:03,316 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:30:03,316 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848292073] [2021-06-12 22:30:03,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:30:03,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:30:03,752 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:30:03,752 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:30:03,752 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848292073] [2021-06-12 22:30:03,752 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [848292073] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:30:03,752 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1991222142] [2021-06-12 22:30:03,752 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:30:03,784 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 22:30:03,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:30:03,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-12 22:30:03,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:30:03,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:30:03,914 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:30:03,926 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:30:03,927 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:30:03,927 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-12 22:30:04,179 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-12 22:30:04,180 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:30:04,191 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:30:04,191 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:30:04,191 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:32 [2021-06-12 22:30:04,672 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:30:04,672 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1991222142] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:30:04,672 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:30:04,672 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 23] total 42 [2021-06-12 22:30:04,672 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524968958] [2021-06-12 22:30:04,672 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-06-12 22:30:04,672 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:30:04,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-06-12 22:30:04,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=1677, Unknown=0, NotChecked=0, Total=1806 [2021-06-12 22:30:04,673 INFO L87 Difference]: Start difference. First operand 7167 states and 21735 transitions. Second operand has 43 states, 43 states have (on average 2.046511627906977) internal successors, (88), 42 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:30:06,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:30:06,745 INFO L93 Difference]: Finished difference Result 9449 states and 28365 transitions. [2021-06-12 22:30:06,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-12 22:30:06,746 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.046511627906977) internal successors, (88), 42 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-12 22:30:06,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:30:06,758 INFO L225 Difference]: With dead ends: 9449 [2021-06-12 22:30:06,758 INFO L226 Difference]: Without dead ends: 9317 [2021-06-12 22:30:06,759 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1001 ImplicationChecksByTransitivity, 2004.3ms TimeCoverageRelationStatistics Valid=259, Invalid=3523, Unknown=0, NotChecked=0, Total=3782 [2021-06-12 22:30:06,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9317 states. [2021-06-12 22:30:06,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9317 to 7101. [2021-06-12 22:30:06,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7101 states, 7100 states have (on average 3.0381690140845072) internal successors, (21571), 7100 states have internal predecessors, (21571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:30:06,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7101 states to 7101 states and 21571 transitions. [2021-06-12 22:30:06,867 INFO L78 Accepts]: Start accepts. Automaton has 7101 states and 21571 transitions. Word has length 48 [2021-06-12 22:30:06,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:30:06,867 INFO L482 AbstractCegarLoop]: Abstraction has 7101 states and 21571 transitions. [2021-06-12 22:30:06,867 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 2.046511627906977) internal successors, (88), 42 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:30:06,867 INFO L276 IsEmpty]: Start isEmpty. Operand 7101 states and 21571 transitions. [2021-06-12 22:30:06,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-12 22:30:06,875 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:30:06,875 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:30:07,075 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable230,228 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:30:07,076 INFO L430 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:30:07,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:30:07,076 INFO L82 PathProgramCache]: Analyzing trace with hash 605999720, now seen corresponding path program 142 times [2021-06-12 22:30:07,076 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:30:07,076 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753460983] [2021-06-12 22:30:07,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:30:07,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:30:07,518 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:30:07,518 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:30:07,518 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753460983] [2021-06-12 22:30:07,518 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753460983] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:30:07,518 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1479583210] [2021-06-12 22:30:07,518 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:30:07,550 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:30:07,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:30:07,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-12 22:30:07,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:30:07,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:30:07,678 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:30:07,690 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:30:07,691 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:30:07,691 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-12 22:30:07,849 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:30:07,849 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:30:07,860 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:30:07,861 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:30:07,861 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-06-12 22:30:08,274 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:30:08,274 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1479583210] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:30:08,274 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:30:08,274 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-12 22:30:08,274 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666921257] [2021-06-12 22:30:08,275 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-12 22:30:08,275 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:30:08,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-12 22:30:08,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1370, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 22:30:08,275 INFO L87 Difference]: Start difference. First operand 7101 states and 21571 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:30:10,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:30:10,424 INFO L93 Difference]: Finished difference Result 9431 states and 28313 transitions. [2021-06-12 22:30:10,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-12 22:30:10,425 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-12 22:30:10,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:30:10,436 INFO L225 Difference]: With dead ends: 9431 [2021-06-12 22:30:10,436 INFO L226 Difference]: Without dead ends: 9273 [2021-06-12 22:30:10,436 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 846 ImplicationChecksByTransitivity, 1920.6ms TimeCoverageRelationStatistics Valid=241, Invalid=3181, Unknown=0, NotChecked=0, Total=3422 [2021-06-12 22:30:10,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9273 states. [2021-06-12 22:30:10,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9273 to 7071. [2021-06-12 22:30:10,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7071 states, 7070 states have (on average 3.042998585572843) internal successors, (21514), 7070 states have internal predecessors, (21514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:30:10,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7071 states to 7071 states and 21514 transitions. [2021-06-12 22:30:10,539 INFO L78 Accepts]: Start accepts. Automaton has 7071 states and 21514 transitions. Word has length 48 [2021-06-12 22:30:10,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:30:10,539 INFO L482 AbstractCegarLoop]: Abstraction has 7071 states and 21514 transitions. [2021-06-12 22:30:10,540 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:30:10,540 INFO L276 IsEmpty]: Start isEmpty. Operand 7071 states and 21514 transitions. [2021-06-12 22:30:10,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-12 22:30:10,547 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:30:10,547 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:30:10,747 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable231,229 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:30:10,748 INFO L430 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:30:10,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:30:10,748 INFO L82 PathProgramCache]: Analyzing trace with hash -1933468878, now seen corresponding path program 143 times [2021-06-12 22:30:10,748 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:30:10,748 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566068546] [2021-06-12 22:30:10,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:30:10,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:30:11,140 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:30:11,140 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:30:11,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566068546] [2021-06-12 22:30:11,140 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566068546] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:30:11,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1729159605] [2021-06-12 22:30:11,140 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:30:11,173 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 22:30:11,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:30:11,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-12 22:30:11,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:30:11,296 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:30:11,297 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:30:11,309 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:30:11,310 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:30:11,310 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-12 22:30:11,479 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:30:11,480 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:30:11,491 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:30:11,492 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:30:11,492 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-06-12 22:30:11,845 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:30:11,846 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1729159605] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:30:11,846 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:30:11,846 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 36 [2021-06-12 22:30:11,846 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271987636] [2021-06-12 22:30:11,846 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-12 22:30:11,846 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:30:11,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-12 22:30:11,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1227, Unknown=0, NotChecked=0, Total=1332 [2021-06-12 22:30:11,846 INFO L87 Difference]: Start difference. First operand 7071 states and 21514 transitions. Second operand has 37 states, 37 states have (on average 2.3783783783783785) internal successors, (88), 36 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:30:13,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:30:13,590 INFO L93 Difference]: Finished difference Result 9392 states and 28204 transitions. [2021-06-12 22:30:13,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-12 22:30:13,591 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.3783783783783785) internal successors, (88), 36 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-12 22:30:13,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:30:13,607 INFO L225 Difference]: With dead ends: 9392 [2021-06-12 22:30:13,607 INFO L226 Difference]: Without dead ends: 9248 [2021-06-12 22:30:13,607 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 742 ImplicationChecksByTransitivity, 1649.0ms TimeCoverageRelationStatistics Valid=220, Invalid=2750, Unknown=0, NotChecked=0, Total=2970 [2021-06-12 22:30:13,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9248 states. [2021-06-12 22:30:13,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9248 to 7134. [2021-06-12 22:30:13,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7134 states, 7133 states have (on average 3.0381326230197674) internal successors, (21671), 7133 states have internal predecessors, (21671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:30:13,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7134 states to 7134 states and 21671 transitions. [2021-06-12 22:30:13,738 INFO L78 Accepts]: Start accepts. Automaton has 7134 states and 21671 transitions. Word has length 48 [2021-06-12 22:30:13,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:30:13,738 INFO L482 AbstractCegarLoop]: Abstraction has 7134 states and 21671 transitions. [2021-06-12 22:30:13,739 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 2.3783783783783785) internal successors, (88), 36 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:30:13,739 INFO L276 IsEmpty]: Start isEmpty. Operand 7134 states and 21671 transitions. [2021-06-12 22:30:13,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-12 22:30:13,747 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:30:13,747 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:30:13,947 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 230 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable232 [2021-06-12 22:30:13,948 INFO L430 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:30:13,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:30:13,948 INFO L82 PathProgramCache]: Analyzing trace with hash -1826018510, now seen corresponding path program 144 times [2021-06-12 22:30:13,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:30:13,948 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454364631] [2021-06-12 22:30:13,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:30:13,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:30:14,363 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:30:14,363 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:30:14,363 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454364631] [2021-06-12 22:30:14,363 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [454364631] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:30:14,363 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1340765187] [2021-06-12 22:30:14,363 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:30:14,395 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 22:30:14,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:30:14,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-12 22:30:14,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:30:14,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:30:14,522 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:30:14,534 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:30:14,535 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:30:14,535 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-12 22:30:14,695 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:30:14,696 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:30:14,707 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:30:14,708 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:30:14,708 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-06-12 22:30:15,180 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:30:15,180 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1340765187] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:30:15,180 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:30:15,180 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-12 22:30:15,180 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359231519] [2021-06-12 22:30:15,180 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-12 22:30:15,180 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:30:15,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-12 22:30:15,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1374, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 22:30:15,181 INFO L87 Difference]: Start difference. First operand 7134 states and 21671 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:30:17,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:30:17,021 INFO L93 Difference]: Finished difference Result 8096 states and 24507 transitions. [2021-06-12 22:30:17,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-12 22:30:17,021 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-12 22:30:17,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:30:17,031 INFO L225 Difference]: With dead ends: 8096 [2021-06-12 22:30:17,031 INFO L226 Difference]: Without dead ends: 8056 [2021-06-12 22:30:17,032 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 852 ImplicationChecksByTransitivity, 2018.8ms TimeCoverageRelationStatistics Valid=265, Invalid=3275, Unknown=0, NotChecked=0, Total=3540 [2021-06-12 22:30:17,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8056 states. [2021-06-12 22:30:17,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8056 to 7146. [2021-06-12 22:30:17,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7146 states, 7145 states have (on average 3.0370888733379986) internal successors, (21700), 7145 states have internal predecessors, (21700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:30:17,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7146 states to 7146 states and 21700 transitions. [2021-06-12 22:30:17,119 INFO L78 Accepts]: Start accepts. Automaton has 7146 states and 21700 transitions. Word has length 48 [2021-06-12 22:30:17,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:30:17,119 INFO L482 AbstractCegarLoop]: Abstraction has 7146 states and 21700 transitions. [2021-06-12 22:30:17,119 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:30:17,119 INFO L276 IsEmpty]: Start isEmpty. Operand 7146 states and 21700 transitions. [2021-06-12 22:30:17,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-12 22:30:17,126 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:30:17,126 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:30:17,327 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable233 [2021-06-12 22:30:17,327 INFO L430 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:30:17,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:30:17,327 INFO L82 PathProgramCache]: Analyzing trace with hash 1592766322, now seen corresponding path program 145 times [2021-06-12 22:30:17,328 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:30:17,328 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651939298] [2021-06-12 22:30:17,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:30:17,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:30:17,777 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:30:17,778 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:30:17,778 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651939298] [2021-06-12 22:30:17,778 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651939298] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:30:17,778 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [950815445] [2021-06-12 22:30:17,778 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:30:17,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:30:17,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-12 22:30:17,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:30:17,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:30:17,935 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:30:17,947 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:30:17,948 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:30:17,948 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-12 22:30:18,104 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-12 22:30:18,104 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:30:18,115 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:30:18,116 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:30:18,116 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:32 [2021-06-12 22:30:18,594 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:30:18,594 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [950815445] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:30:18,594 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:30:18,595 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-12 22:30:18,595 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476976677] [2021-06-12 22:30:18,595 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-12 22:30:18,595 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:30:18,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-12 22:30:18,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1372, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 22:30:18,595 INFO L87 Difference]: Start difference. First operand 7146 states and 21700 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:30:20,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:30:20,647 INFO L93 Difference]: Finished difference Result 9303 states and 27976 transitions. [2021-06-12 22:30:20,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-12 22:30:20,648 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-12 22:30:20,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:30:20,661 INFO L225 Difference]: With dead ends: 9303 [2021-06-12 22:30:20,661 INFO L226 Difference]: Without dead ends: 9264 [2021-06-12 22:30:20,661 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 812 ImplicationChecksByTransitivity, 1921.1ms TimeCoverageRelationStatistics Valid=230, Invalid=3076, Unknown=0, NotChecked=0, Total=3306 [2021-06-12 22:30:20,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9264 states. [2021-06-12 22:30:20,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9264 to 7142. [2021-06-12 22:30:20,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7142 states, 7141 states have (on average 3.037249684918079) internal successors, (21689), 7141 states have internal predecessors, (21689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:30:20,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7142 states to 7142 states and 21689 transitions. [2021-06-12 22:30:20,768 INFO L78 Accepts]: Start accepts. Automaton has 7142 states and 21689 transitions. Word has length 48 [2021-06-12 22:30:20,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:30:20,768 INFO L482 AbstractCegarLoop]: Abstraction has 7142 states and 21689 transitions. [2021-06-12 22:30:20,768 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:30:20,768 INFO L276 IsEmpty]: Start isEmpty. Operand 7142 states and 21689 transitions. [2021-06-12 22:30:20,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-12 22:30:20,776 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:30:20,776 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:30:20,976 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 232 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable234 [2021-06-12 22:30:20,976 INFO L430 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:30:20,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:30:20,977 INFO L82 PathProgramCache]: Analyzing trace with hash 1734481462, now seen corresponding path program 146 times [2021-06-12 22:30:20,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:30:20,977 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9747635] [2021-06-12 22:30:20,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:30:20,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:30:21,396 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:30:21,396 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:30:21,396 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9747635] [2021-06-12 22:30:21,396 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [9747635] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:30:21,396 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [251937359] [2021-06-12 22:30:21,396 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:30:21,428 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:30:21,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:30:21,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-12 22:30:21,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:30:21,553 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:30:21,554 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:30:21,566 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:30:21,566 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:30:21,567 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-12 22:30:21,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-12 22:30:21,724 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:30:21,735 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:30:21,735 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:30:21,735 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:32 [2021-06-12 22:30:22,140 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:30:22,140 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [251937359] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:30:22,140 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:30:22,140 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-12 22:30:22,140 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471273260] [2021-06-12 22:30:22,140 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-12 22:30:22,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:30:22,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-12 22:30:22,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1372, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 22:30:22,141 INFO L87 Difference]: Start difference. First operand 7142 states and 21689 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:30:24,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:30:24,232 INFO L93 Difference]: Finished difference Result 9371 states and 28115 transitions. [2021-06-12 22:30:24,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-12 22:30:24,233 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-12 22:30:24,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:30:24,245 INFO L225 Difference]: With dead ends: 9371 [2021-06-12 22:30:24,245 INFO L226 Difference]: Without dead ends: 9314 [2021-06-12 22:30:24,246 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 784 ImplicationChecksByTransitivity, 1759.7ms TimeCoverageRelationStatistics Valid=225, Invalid=2967, Unknown=0, NotChecked=0, Total=3192 [2021-06-12 22:30:24,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9314 states. [2021-06-12 22:30:24,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9314 to 7148. [2021-06-12 22:30:24,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7148 states, 7147 states have (on average 3.0365188190849306) internal successors, (21702), 7147 states have internal predecessors, (21702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:30:24,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7148 states to 7148 states and 21702 transitions. [2021-06-12 22:30:24,344 INFO L78 Accepts]: Start accepts. Automaton has 7148 states and 21702 transitions. Word has length 48 [2021-06-12 22:30:24,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:30:24,344 INFO L482 AbstractCegarLoop]: Abstraction has 7148 states and 21702 transitions. [2021-06-12 22:30:24,344 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:30:24,344 INFO L276 IsEmpty]: Start isEmpty. Operand 7148 states and 21702 transitions. [2021-06-12 22:30:24,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-12 22:30:24,351 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:30:24,351 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:30:24,551 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 233 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable235 [2021-06-12 22:30:24,551 INFO L430 AbstractCegarLoop]: === Iteration 237 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:30:24,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:30:24,552 INFO L82 PathProgramCache]: Analyzing trace with hash 451334002, now seen corresponding path program 147 times [2021-06-12 22:30:24,552 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:30:24,552 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841448664] [2021-06-12 22:30:24,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:30:24,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:30:24,949 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:30:24,950 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:30:24,950 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841448664] [2021-06-12 22:30:24,950 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [841448664] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:30:24,950 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [897663457] [2021-06-12 22:30:24,950 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:30:24,982 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 22:30:24,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:30:24,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-12 22:30:24,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:30:25,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:30:25,107 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:30:25,119 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:30:25,120 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:30:25,120 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-12 22:30:25,393 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-12 22:30:25,393 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:30:25,404 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:30:25,405 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:30:25,405 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:32 [2021-06-12 22:30:25,814 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:30:25,815 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [897663457] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:30:25,815 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:30:25,815 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22] total 40 [2021-06-12 22:30:25,815 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839746731] [2021-06-12 22:30:25,815 INFO L462 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-06-12 22:30:25,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:30:25,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-06-12 22:30:25,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1518, Unknown=0, NotChecked=0, Total=1640 [2021-06-12 22:30:25,816 INFO L87 Difference]: Start difference. First operand 7148 states and 21702 transitions. Second operand has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:30:27,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:30:27,712 INFO L93 Difference]: Finished difference Result 9330 states and 28031 transitions. [2021-06-12 22:30:27,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-12 22:30:27,712 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-12 22:30:27,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:30:27,724 INFO L225 Difference]: With dead ends: 9330 [2021-06-12 22:30:27,724 INFO L226 Difference]: Without dead ends: 9236 [2021-06-12 22:30:27,725 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 925 ImplicationChecksByTransitivity, 1859.8ms TimeCoverageRelationStatistics Valid=245, Invalid=3177, Unknown=0, NotChecked=0, Total=3422 [2021-06-12 22:30:27,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9236 states. [2021-06-12 22:30:27,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9236 to 7128. [2021-06-12 22:30:27,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7128 states, 7127 states have (on average 3.039006594640101) internal successors, (21659), 7127 states have internal predecessors, (21659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:30:27,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7128 states to 7128 states and 21659 transitions. [2021-06-12 22:30:27,848 INFO L78 Accepts]: Start accepts. Automaton has 7128 states and 21659 transitions. Word has length 48 [2021-06-12 22:30:27,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:30:27,848 INFO L482 AbstractCegarLoop]: Abstraction has 7128 states and 21659 transitions. [2021-06-12 22:30:27,848 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:30:27,848 INFO L276 IsEmpty]: Start isEmpty. Operand 7128 states and 21659 transitions. [2021-06-12 22:30:27,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-12 22:30:27,855 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:30:27,856 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:30:28,056 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable236,234 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:30:28,057 INFO L430 AbstractCegarLoop]: === Iteration 238 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:30:28,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:30:28,057 INFO L82 PathProgramCache]: Analyzing trace with hash 2113940812, now seen corresponding path program 148 times [2021-06-12 22:30:28,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:30:28,057 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027736309] [2021-06-12 22:30:28,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:30:28,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:30:28,439 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:30:28,439 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:30:28,440 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027736309] [2021-06-12 22:30:28,440 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1027736309] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:30:28,440 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1904616294] [2021-06-12 22:30:28,440 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:30:28,473 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:30:28,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:30:28,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-12 22:30:28,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:30:28,595 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:30:28,596 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:30:28,608 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:30:28,609 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:30:28,609 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-12 22:30:28,767 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-12 22:30:28,768 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:30:28,779 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:30:28,780 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:30:28,780 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:32 [2021-06-12 22:30:29,136 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:30:29,136 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1904616294] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:30:29,136 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:30:29,136 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 36 [2021-06-12 22:30:29,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578793459] [2021-06-12 22:30:29,136 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-12 22:30:29,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:30:29,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-12 22:30:29,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1227, Unknown=0, NotChecked=0, Total=1332 [2021-06-12 22:30:29,137 INFO L87 Difference]: Start difference. First operand 7128 states and 21659 transitions. Second operand has 37 states, 37 states have (on average 2.3783783783783785) internal successors, (88), 36 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:30:30,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:30:30,960 INFO L93 Difference]: Finished difference Result 9460 states and 28348 transitions. [2021-06-12 22:30:30,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-12 22:30:30,960 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.3783783783783785) internal successors, (88), 36 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-12 22:30:30,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:30:30,974 INFO L225 Difference]: With dead ends: 9460 [2021-06-12 22:30:30,974 INFO L226 Difference]: Without dead ends: 9316 [2021-06-12 22:30:30,974 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 742 ImplicationChecksByTransitivity, 1632.5ms TimeCoverageRelationStatistics Valid=220, Invalid=2750, Unknown=0, NotChecked=0, Total=2970 [2021-06-12 22:30:30,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9316 states. [2021-06-12 22:30:31,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9316 to 7188. [2021-06-12 22:30:31,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7188 states, 7187 states have (on average 3.032558786698205) internal successors, (21795), 7187 states have internal predecessors, (21795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:30:31,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7188 states to 7188 states and 21795 transitions. [2021-06-12 22:30:31,092 INFO L78 Accepts]: Start accepts. Automaton has 7188 states and 21795 transitions. Word has length 48 [2021-06-12 22:30:31,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:30:31,092 INFO L482 AbstractCegarLoop]: Abstraction has 7188 states and 21795 transitions. [2021-06-12 22:30:31,092 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 2.3783783783783785) internal successors, (88), 36 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:30:31,092 INFO L276 IsEmpty]: Start isEmpty. Operand 7188 states and 21795 transitions. [2021-06-12 22:30:31,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-12 22:30:31,100 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:30:31,100 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:30:31,300 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 235 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable237 [2021-06-12 22:30:31,301 INFO L430 AbstractCegarLoop]: === Iteration 239 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:30:31,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:30:31,301 INFO L82 PathProgramCache]: Analyzing trace with hash 2140009688, now seen corresponding path program 149 times [2021-06-12 22:30:31,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:30:31,301 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200779075] [2021-06-12 22:30:31,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:30:31,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:30:31,697 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:30:31,697 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:30:31,697 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200779075] [2021-06-12 22:30:31,698 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1200779075] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:30:31,698 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [544026467] [2021-06-12 22:30:31,698 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:30:31,730 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 22:30:31,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:30:31,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 44 conjunts are in the unsatisfiable core [2021-06-12 22:30:31,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:30:31,855 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:30:31,856 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:30:31,868 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:30:31,869 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:30:31,869 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-12 22:30:32,025 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-12 22:30:32,026 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:30:32,037 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:30:32,037 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:30:32,038 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:32 [2021-06-12 22:30:32,458 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:30:32,458 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [544026467] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:30:32,458 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:30:32,458 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-12 22:30:32,458 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420050638] [2021-06-12 22:30:32,458 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-12 22:30:32,458 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:30:32,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-12 22:30:32,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1374, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 22:30:32,459 INFO L87 Difference]: Start difference. First operand 7188 states and 21795 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:30:34,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:30:34,628 INFO L93 Difference]: Finished difference Result 8160 states and 24654 transitions. [2021-06-12 22:30:34,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-12 22:30:34,629 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-12 22:30:34,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:30:34,639 INFO L225 Difference]: With dead ends: 8160 [2021-06-12 22:30:34,639 INFO L226 Difference]: Without dead ends: 8120 [2021-06-12 22:30:34,639 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 852 ImplicationChecksByTransitivity, 2029.3ms TimeCoverageRelationStatistics Valid=265, Invalid=3275, Unknown=0, NotChecked=0, Total=3540 [2021-06-12 22:30:34,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8120 states. [2021-06-12 22:30:34,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8120 to 7206. [2021-06-12 22:30:34,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7206 states, 7205 states have (on average 3.0312283136710616) internal successors, (21840), 7205 states have internal predecessors, (21840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:30:34,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7206 states to 7206 states and 21840 transitions. [2021-06-12 22:30:34,726 INFO L78 Accepts]: Start accepts. Automaton has 7206 states and 21840 transitions. Word has length 48 [2021-06-12 22:30:34,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:30:34,727 INFO L482 AbstractCegarLoop]: Abstraction has 7206 states and 21840 transitions. [2021-06-12 22:30:34,727 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:30:34,727 INFO L276 IsEmpty]: Start isEmpty. Operand 7206 states and 21840 transitions. [2021-06-12 22:30:34,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-12 22:30:34,734 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:30:34,734 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:30:34,934 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable238,236 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:30:34,934 INFO L430 AbstractCegarLoop]: === Iteration 240 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:30:34,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:30:34,935 INFO L82 PathProgramCache]: Analyzing trace with hash 1911250844, now seen corresponding path program 150 times [2021-06-12 22:30:34,935 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:30:34,935 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268305139] [2021-06-12 22:30:34,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:30:34,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:30:35,375 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:30:35,375 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:30:35,375 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268305139] [2021-06-12 22:30:35,375 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268305139] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:30:35,375 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [456914356] [2021-06-12 22:30:35,375 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:30:35,407 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 22:30:35,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:30:35,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-12 22:30:35,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:30:35,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:30:35,536 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:30:35,548 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:30:35,549 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:30:35,549 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-12 22:30:35,706 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:30:35,706 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:30:35,717 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:30:35,718 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:30:35,718 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-06-12 22:30:36,151 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:30:36,152 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [456914356] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:30:36,152 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:30:36,152 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-12 22:30:36,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57291344] [2021-06-12 22:30:36,152 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-12 22:30:36,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:30:36,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-12 22:30:36,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1372, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 22:30:36,152 INFO L87 Difference]: Start difference. First operand 7206 states and 21840 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:30:37,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:30:37,958 INFO L93 Difference]: Finished difference Result 9349 states and 28076 transitions. [2021-06-12 22:30:37,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-12 22:30:37,958 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-12 22:30:37,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:30:37,969 INFO L225 Difference]: With dead ends: 9349 [2021-06-12 22:30:37,969 INFO L226 Difference]: Without dead ends: 9304 [2021-06-12 22:30:37,969 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 812 ImplicationChecksByTransitivity, 1834.9ms TimeCoverageRelationStatistics Valid=230, Invalid=3076, Unknown=0, NotChecked=0, Total=3306 [2021-06-12 22:30:37,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9304 states. [2021-06-12 22:30:38,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9304 to 7200. [2021-06-12 22:30:38,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7200 states, 7199 states have (on average 3.0311154326989858) internal successors, (21821), 7199 states have internal predecessors, (21821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:30:38,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7200 states to 7200 states and 21821 transitions. [2021-06-12 22:30:38,064 INFO L78 Accepts]: Start accepts. Automaton has 7200 states and 21821 transitions. Word has length 48 [2021-06-12 22:30:38,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:30:38,065 INFO L482 AbstractCegarLoop]: Abstraction has 7200 states and 21821 transitions. [2021-06-12 22:30:38,065 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:30:38,065 INFO L276 IsEmpty]: Start isEmpty. Operand 7200 states and 21821 transitions. [2021-06-12 22:30:38,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-12 22:30:38,072 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:30:38,072 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:30:38,272 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 237 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable239 [2021-06-12 22:30:38,272 INFO L430 AbstractCegarLoop]: === Iteration 241 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:30:38,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:30:38,273 INFO L82 PathProgramCache]: Analyzing trace with hash 964519044, now seen corresponding path program 151 times [2021-06-12 22:30:38,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:30:38,273 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402354193] [2021-06-12 22:30:38,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:30:38,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:30:38,688 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:30:38,688 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:30:38,688 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402354193] [2021-06-12 22:30:38,688 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1402354193] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:30:38,688 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [548604709] [2021-06-12 22:30:38,688 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:30:38,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:30:38,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-12 22:30:38,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:30:38,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:30:38,845 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:30:38,857 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:30:38,857 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:30:38,857 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-12 22:30:39,009 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-12 22:30:39,010 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:30:39,021 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:30:39,021 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:30:39,022 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:32 [2021-06-12 22:30:39,432 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:30:39,432 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [548604709] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:30:39,432 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:30:39,432 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-12 22:30:39,432 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481385612] [2021-06-12 22:30:39,432 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-12 22:30:39,433 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:30:39,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-12 22:30:39,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1372, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 22:30:39,433 INFO L87 Difference]: Start difference. First operand 7200 states and 21821 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:30:41,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:30:41,120 INFO L93 Difference]: Finished difference Result 9453 states and 28296 transitions. [2021-06-12 22:30:41,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-12 22:30:41,120 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-12 22:30:41,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:30:41,133 INFO L225 Difference]: With dead ends: 9453 [2021-06-12 22:30:41,133 INFO L226 Difference]: Without dead ends: 9394 [2021-06-12 22:30:41,134 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 784 ImplicationChecksByTransitivity, 1736.1ms TimeCoverageRelationStatistics Valid=225, Invalid=2967, Unknown=0, NotChecked=0, Total=3192 [2021-06-12 22:30:41,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9394 states. [2021-06-12 22:30:41,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9394 to 7206. [2021-06-12 22:30:41,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7206 states, 7205 states have (on average 3.0303955586398335) internal successors, (21834), 7205 states have internal predecessors, (21834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:30:41,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7206 states to 7206 states and 21834 transitions. [2021-06-12 22:30:41,239 INFO L78 Accepts]: Start accepts. Automaton has 7206 states and 21834 transitions. Word has length 48 [2021-06-12 22:30:41,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:30:41,239 INFO L482 AbstractCegarLoop]: Abstraction has 7206 states and 21834 transitions. [2021-06-12 22:30:41,239 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:30:41,239 INFO L276 IsEmpty]: Start isEmpty. Operand 7206 states and 21834 transitions. [2021-06-12 22:30:41,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-12 22:30:41,247 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:30:41,247 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:30:41,447 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable240,238 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:30:41,447 INFO L430 AbstractCegarLoop]: === Iteration 242 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:30:41,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:30:41,447 INFO L82 PathProgramCache]: Analyzing trace with hash 810081526, now seen corresponding path program 152 times [2021-06-12 22:30:41,447 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:30:41,448 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570549746] [2021-06-12 22:30:41,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:30:41,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:30:41,845 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:30:41,845 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:30:41,845 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570549746] [2021-06-12 22:30:41,845 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1570549746] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:30:41,845 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1335973220] [2021-06-12 22:30:41,845 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:30:41,877 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:30:41,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:30:41,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-12 22:30:41,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:30:41,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:30:42,000 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:30:42,013 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:30:42,013 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:30:42,013 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-12 22:30:42,165 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-12 22:30:42,166 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:30:42,177 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:30:42,178 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:30:42,178 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:32 [2021-06-12 22:30:42,590 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:30:42,591 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1335973220] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:30:42,591 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:30:42,591 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-12 22:30:42,591 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145878677] [2021-06-12 22:30:42,591 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-12 22:30:42,591 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:30:42,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-12 22:30:42,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1370, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 22:30:42,592 INFO L87 Difference]: Start difference. First operand 7206 states and 21834 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:30:44,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:30:44,459 INFO L93 Difference]: Finished difference Result 9400 states and 28183 transitions. [2021-06-12 22:30:44,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-12 22:30:44,459 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-12 22:30:44,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:30:44,472 INFO L225 Difference]: With dead ends: 9400 [2021-06-12 22:30:44,472 INFO L226 Difference]: Without dead ends: 9244 [2021-06-12 22:30:44,472 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 804 ImplicationChecksByTransitivity, 1723.2ms TimeCoverageRelationStatistics Valid=228, Invalid=2964, Unknown=0, NotChecked=0, Total=3192 [2021-06-12 22:30:44,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9244 states. [2021-06-12 22:30:44,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9244 to 7140. [2021-06-12 22:30:44,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7140 states, 7139 states have (on average 3.034738758929822) internal successors, (21665), 7139 states have internal predecessors, (21665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:30:44,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7140 states to 7140 states and 21665 transitions. [2021-06-12 22:30:44,572 INFO L78 Accepts]: Start accepts. Automaton has 7140 states and 21665 transitions. Word has length 48 [2021-06-12 22:30:44,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:30:44,572 INFO L482 AbstractCegarLoop]: Abstraction has 7140 states and 21665 transitions. [2021-06-12 22:30:44,572 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:30:44,572 INFO L276 IsEmpty]: Start isEmpty. Operand 7140 states and 21665 transitions. [2021-06-12 22:30:44,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-12 22:30:44,579 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:30:44,579 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:30:44,780 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable241,239 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:30:44,780 INFO L430 AbstractCegarLoop]: === Iteration 243 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:30:44,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:30:44,780 INFO L82 PathProgramCache]: Analyzing trace with hash -713305844, now seen corresponding path program 153 times [2021-06-12 22:30:44,780 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:30:44,780 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460413203] [2021-06-12 22:30:44,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:30:44,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:30:45,176 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:30:45,177 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:30:45,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460413203] [2021-06-12 22:30:45,177 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [460413203] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:30:45,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1243651139] [2021-06-12 22:30:45,177 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:30:45,209 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 22:30:45,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:30:45,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-12 22:30:45,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:30:45,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:30:45,372 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:30:45,384 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:30:45,384 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:30:45,384 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-12 22:30:45,539 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-12 22:30:45,540 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:30:45,551 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:30:45,551 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:30:45,552 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:32 [2021-06-12 22:30:45,973 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:30:45,974 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1243651139] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:30:45,974 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:30:45,974 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-12 22:30:45,974 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373800768] [2021-06-12 22:30:45,974 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-12 22:30:45,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:30:45,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-12 22:30:45,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1374, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 22:30:45,975 INFO L87 Difference]: Start difference. First operand 7140 states and 21665 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:30:48,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:30:48,111 INFO L93 Difference]: Finished difference Result 8102 states and 24501 transitions. [2021-06-12 22:30:48,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-12 22:30:48,111 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-12 22:30:48,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:30:48,121 INFO L225 Difference]: With dead ends: 8102 [2021-06-12 22:30:48,121 INFO L226 Difference]: Without dead ends: 8062 [2021-06-12 22:30:48,121 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 801 ImplicationChecksByTransitivity, 2018.3ms TimeCoverageRelationStatistics Valid=275, Invalid=3147, Unknown=0, NotChecked=0, Total=3422 [2021-06-12 22:30:48,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8062 states. [2021-06-12 22:30:48,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8062 to 7148. [2021-06-12 22:30:48,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7148 states, 7147 states have (on average 3.034000279837694) internal successors, (21684), 7147 states have internal predecessors, (21684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:30:48,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7148 states to 7148 states and 21684 transitions. [2021-06-12 22:30:48,206 INFO L78 Accepts]: Start accepts. Automaton has 7148 states and 21684 transitions. Word has length 48 [2021-06-12 22:30:48,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:30:48,206 INFO L482 AbstractCegarLoop]: Abstraction has 7148 states and 21684 transitions. [2021-06-12 22:30:48,206 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:30:48,206 INFO L276 IsEmpty]: Start isEmpty. Operand 7148 states and 21684 transitions. [2021-06-12 22:30:48,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-12 22:30:48,213 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:30:48,213 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:30:48,414 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 240 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable242 [2021-06-12 22:30:48,414 INFO L430 AbstractCegarLoop]: === Iteration 244 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:30:48,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:30:48,414 INFO L82 PathProgramCache]: Analyzing trace with hash -1589488308, now seen corresponding path program 154 times [2021-06-12 22:30:48,414 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:30:48,414 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563814262] [2021-06-12 22:30:48,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:30:48,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:30:48,805 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:30:48,805 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:30:48,805 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563814262] [2021-06-12 22:30:48,805 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [563814262] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:30:48,805 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1542852032] [2021-06-12 22:30:48,805 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:30:48,839 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:30:48,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:30:48,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-12 22:30:48,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:30:48,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:30:48,966 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:30:48,978 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:30:48,979 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:30:48,979 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-12 22:30:49,146 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-12 22:30:49,147 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:30:49,161 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:30:49,161 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:30:49,161 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:32 [2021-06-12 22:30:49,582 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:30:49,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1542852032] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:30:49,582 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:30:49,582 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-12 22:30:49,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559296902] [2021-06-12 22:30:49,582 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-12 22:30:49,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:30:49,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-12 22:30:49,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1374, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 22:30:49,583 INFO L87 Difference]: Start difference. First operand 7148 states and 21684 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:30:51,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:30:51,343 INFO L93 Difference]: Finished difference Result 8068 states and 24432 transitions. [2021-06-12 22:30:51,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-12 22:30:51,343 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-12 22:30:51,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:30:51,353 INFO L225 Difference]: With dead ends: 8068 [2021-06-12 22:30:51,353 INFO L226 Difference]: Without dead ends: 8029 [2021-06-12 22:30:51,353 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 782 ImplicationChecksByTransitivity, 1921.0ms TimeCoverageRelationStatistics Valid=252, Invalid=3054, Unknown=0, NotChecked=0, Total=3306 [2021-06-12 22:30:51,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8029 states. [2021-06-12 22:30:51,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8029 to 7144. [2021-06-12 22:30:51,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7144 states, 7143 states have (on average 3.0345793084138317) internal successors, (21676), 7143 states have internal predecessors, (21676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:30:51,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7144 states to 7144 states and 21676 transitions. [2021-06-12 22:30:51,438 INFO L78 Accepts]: Start accepts. Automaton has 7144 states and 21676 transitions. Word has length 48 [2021-06-12 22:30:51,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:30:51,438 INFO L482 AbstractCegarLoop]: Abstraction has 7144 states and 21676 transitions. [2021-06-12 22:30:51,438 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:30:51,438 INFO L276 IsEmpty]: Start isEmpty. Operand 7144 states and 21676 transitions. [2021-06-12 22:30:51,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-12 22:30:51,445 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:30:51,445 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:30:51,645 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 241 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable243 [2021-06-12 22:30:51,645 INFO L430 AbstractCegarLoop]: === Iteration 245 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:30:51,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:30:51,646 INFO L82 PathProgramCache]: Analyzing trace with hash -345440948, now seen corresponding path program 155 times [2021-06-12 22:30:51,646 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:30:51,646 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567776910] [2021-06-12 22:30:51,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:30:51,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:30:52,049 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:30:52,049 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:30:52,049 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567776910] [2021-06-12 22:30:52,049 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [567776910] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:30:52,049 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [549121470] [2021-06-12 22:30:52,049 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:30:52,081 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 22:30:52,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:30:52,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 44 conjunts are in the unsatisfiable core [2021-06-12 22:30:52,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:30:52,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:30:52,210 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:30:52,222 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:30:52,222 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:30:52,223 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-12 22:30:52,379 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-12 22:30:52,380 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:30:52,391 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:30:52,392 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:30:52,392 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:32 [2021-06-12 22:30:52,859 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:30:52,859 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [549121470] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:30:52,859 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:30:52,859 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-12 22:30:52,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903103774] [2021-06-12 22:30:52,859 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-12 22:30:52,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:30:52,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-12 22:30:52,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1374, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 22:30:52,860 INFO L87 Difference]: Start difference. First operand 7144 states and 21676 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:30:54,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:30:54,853 INFO L93 Difference]: Finished difference Result 8108 states and 24513 transitions. [2021-06-12 22:30:54,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-12 22:30:54,854 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-12 22:30:54,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:30:54,864 INFO L225 Difference]: With dead ends: 8108 [2021-06-12 22:30:54,864 INFO L226 Difference]: Without dead ends: 8068 [2021-06-12 22:30:54,864 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 801 ImplicationChecksByTransitivity, 2064.0ms TimeCoverageRelationStatistics Valid=275, Invalid=3147, Unknown=0, NotChecked=0, Total=3422 [2021-06-12 22:30:54,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8068 states. [2021-06-12 22:30:54,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8068 to 7150. [2021-06-12 22:30:54,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7150 states, 7149 states have (on average 3.033850888236117) internal successors, (21689), 7149 states have internal predecessors, (21689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:30:55,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7150 states to 7150 states and 21689 transitions. [2021-06-12 22:30:55,001 INFO L78 Accepts]: Start accepts. Automaton has 7150 states and 21689 transitions. Word has length 48 [2021-06-12 22:30:55,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:30:55,001 INFO L482 AbstractCegarLoop]: Abstraction has 7150 states and 21689 transitions. [2021-06-12 22:30:55,001 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:30:55,001 INFO L276 IsEmpty]: Start isEmpty. Operand 7150 states and 21689 transitions. [2021-06-12 22:30:55,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-12 22:30:55,008 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:30:55,008 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:30:55,212 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 242 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable244 [2021-06-12 22:30:55,213 INFO L430 AbstractCegarLoop]: === Iteration 246 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:30:55,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:30:55,213 INFO L82 PathProgramCache]: Analyzing trace with hash 1418228982, now seen corresponding path program 156 times [2021-06-12 22:30:55,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:30:55,213 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926773717] [2021-06-12 22:30:55,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:30:55,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:30:55,607 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:30:55,607 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:30:55,607 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926773717] [2021-06-12 22:30:55,607 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1926773717] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:30:55,607 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1568489773] [2021-06-12 22:30:55,608 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:30:55,639 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 22:30:55,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:30:55,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-12 22:30:55,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:30:55,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:30:55,766 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:30:55,778 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:30:55,778 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:30:55,778 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-12 22:30:55,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:30:55,937 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:30:55,947 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:30:55,948 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:30:55,948 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-06-12 22:30:56,366 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:30:56,366 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1568489773] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:30:56,366 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:30:56,366 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-12 22:30:56,367 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85220536] [2021-06-12 22:30:56,367 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-12 22:30:56,367 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:30:56,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-12 22:30:56,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1374, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 22:30:56,367 INFO L87 Difference]: Start difference. First operand 7150 states and 21689 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:30:58,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:30:58,296 INFO L93 Difference]: Finished difference Result 8078 states and 24453 transitions. [2021-06-12 22:30:58,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-12 22:30:58,297 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-12 22:30:58,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:30:58,307 INFO L225 Difference]: With dead ends: 8078 [2021-06-12 22:30:58,308 INFO L226 Difference]: Without dead ends: 8033 [2021-06-12 22:30:58,308 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 782 ImplicationChecksByTransitivity, 1877.5ms TimeCoverageRelationStatistics Valid=252, Invalid=3054, Unknown=0, NotChecked=0, Total=3306 [2021-06-12 22:30:58,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8033 states. [2021-06-12 22:30:58,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8033 to 7144. [2021-06-12 22:30:58,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7144 states, 7143 states have (on average 3.0342993140137198) internal successors, (21674), 7143 states have internal predecessors, (21674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:30:58,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7144 states to 7144 states and 21674 transitions. [2021-06-12 22:30:58,400 INFO L78 Accepts]: Start accepts. Automaton has 7144 states and 21674 transitions. Word has length 48 [2021-06-12 22:30:58,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:30:58,400 INFO L482 AbstractCegarLoop]: Abstraction has 7144 states and 21674 transitions. [2021-06-12 22:30:58,400 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:30:58,400 INFO L276 IsEmpty]: Start isEmpty. Operand 7144 states and 21674 transitions. [2021-06-12 22:30:58,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-12 22:30:58,407 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:30:58,407 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:30:58,607 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 243 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable245 [2021-06-12 22:30:58,608 INFO L430 AbstractCegarLoop]: === Iteration 247 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:30:58,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:30:58,608 INFO L82 PathProgramCache]: Analyzing trace with hash 1478525324, now seen corresponding path program 157 times [2021-06-12 22:30:58,608 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:30:58,608 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954849241] [2021-06-12 22:30:58,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:30:58,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:30:58,997 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:30:58,997 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:30:58,998 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954849241] [2021-06-12 22:30:58,998 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [954849241] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:30:58,998 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2087357379] [2021-06-12 22:30:58,998 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:30:59,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:30:59,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-12 22:30:59,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:30:59,154 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:30:59,155 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:30:59,167 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:30:59,168 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:30:59,168 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-12 22:30:59,323 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-12 22:30:59,324 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:30:59,335 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:30:59,335 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:30:59,335 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:32 [2021-06-12 22:30:59,741 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:30:59,741 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2087357379] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:30:59,741 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:30:59,741 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-12 22:30:59,741 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359831897] [2021-06-12 22:30:59,742 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-12 22:30:59,742 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:30:59,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-12 22:30:59,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1372, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 22:30:59,742 INFO L87 Difference]: Start difference. First operand 7144 states and 21674 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:31:01,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:31:01,534 INFO L93 Difference]: Finished difference Result 9287 states and 27912 transitions. [2021-06-12 22:31:01,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-12 22:31:01,534 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-12 22:31:01,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:31:01,546 INFO L225 Difference]: With dead ends: 9287 [2021-06-12 22:31:01,546 INFO L226 Difference]: Without dead ends: 9252 [2021-06-12 22:31:01,547 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 779 ImplicationChecksByTransitivity, 1705.2ms TimeCoverageRelationStatistics Valid=225, Invalid=2967, Unknown=0, NotChecked=0, Total=3192 [2021-06-12 22:31:01,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9252 states. [2021-06-12 22:31:01,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9252 to 7148. [2021-06-12 22:31:01,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7148 states, 7147 states have (on average 3.0337204421435566) internal successors, (21682), 7147 states have internal predecessors, (21682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:31:01,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7148 states to 7148 states and 21682 transitions. [2021-06-12 22:31:01,645 INFO L78 Accepts]: Start accepts. Automaton has 7148 states and 21682 transitions. Word has length 48 [2021-06-12 22:31:01,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:31:01,645 INFO L482 AbstractCegarLoop]: Abstraction has 7148 states and 21682 transitions. [2021-06-12 22:31:01,645 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:31:01,645 INFO L276 IsEmpty]: Start isEmpty. Operand 7148 states and 21682 transitions. [2021-06-12 22:31:01,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-12 22:31:01,652 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:31:01,652 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:31:01,853 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 244 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable246 [2021-06-12 22:31:01,853 INFO L430 AbstractCegarLoop]: === Iteration 248 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:31:01,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:31:01,853 INFO L82 PathProgramCache]: Analyzing trace with hash 871087564, now seen corresponding path program 158 times [2021-06-12 22:31:01,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:31:01,853 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943491903] [2021-06-12 22:31:01,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:31:01,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:31:02,244 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:31:02,244 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:31:02,244 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943491903] [2021-06-12 22:31:02,244 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [943491903] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:31:02,244 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [492348868] [2021-06-12 22:31:02,244 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:31:02,276 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:31:02,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:31:02,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-12 22:31:02,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:31:02,402 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:31:02,402 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:31:02,414 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:31:02,415 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:31:02,415 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-12 22:31:02,605 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-12 22:31:02,606 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:31:02,617 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:31:02,618 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:31:02,618 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:32 [2021-06-12 22:31:03,023 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:31:03,023 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [492348868] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:31:03,023 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:31:03,023 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-12 22:31:03,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935100280] [2021-06-12 22:31:03,024 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-12 22:31:03,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:31:03,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-12 22:31:03,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1372, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 22:31:03,024 INFO L87 Difference]: Start difference. First operand 7148 states and 21682 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:31:04,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:31:04,892 INFO L93 Difference]: Finished difference Result 9291 states and 27918 transitions. [2021-06-12 22:31:04,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-12 22:31:04,892 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-12 22:31:04,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:31:04,904 INFO L225 Difference]: With dead ends: 9291 [2021-06-12 22:31:04,904 INFO L226 Difference]: Without dead ends: 9246 [2021-06-12 22:31:04,904 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 779 ImplicationChecksByTransitivity, 1744.1ms TimeCoverageRelationStatistics Valid=225, Invalid=2967, Unknown=0, NotChecked=0, Total=3192 [2021-06-12 22:31:04,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9246 states. [2021-06-12 22:31:05,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9246 to 7142. [2021-06-12 22:31:05,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7142 states, 7141 states have (on average 3.0344489567287494) internal successors, (21669), 7141 states have internal predecessors, (21669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:31:05,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7142 states to 7142 states and 21669 transitions. [2021-06-12 22:31:05,030 INFO L78 Accepts]: Start accepts. Automaton has 7142 states and 21669 transitions. Word has length 48 [2021-06-12 22:31:05,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:31:05,030 INFO L482 AbstractCegarLoop]: Abstraction has 7142 states and 21669 transitions. [2021-06-12 22:31:05,030 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:31:05,030 INFO L276 IsEmpty]: Start isEmpty. Operand 7142 states and 21669 transitions. [2021-06-12 22:31:05,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-12 22:31:05,037 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:31:05,037 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:31:05,237 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 245 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable247 [2021-06-12 22:31:05,238 INFO L430 AbstractCegarLoop]: === Iteration 249 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:31:05,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:31:05,238 INFO L82 PathProgramCache]: Analyzing trace with hash 1408250336, now seen corresponding path program 159 times [2021-06-12 22:31:05,238 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:31:05,238 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970371412] [2021-06-12 22:31:05,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:31:05,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:31:05,634 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:31:05,635 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:31:05,635 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970371412] [2021-06-12 22:31:05,635 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [970371412] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:31:05,635 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [461746766] [2021-06-12 22:31:05,635 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:31:05,666 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 22:31:05,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:31:05,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-12 22:31:05,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:31:05,791 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:31:05,792 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:31:05,804 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:31:05,805 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:31:05,805 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-12 22:31:05,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-12 22:31:05,959 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:31:05,970 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:31:05,971 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:31:05,971 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:32 [2021-06-12 22:31:06,386 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:31:06,386 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [461746766] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:31:06,386 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:31:06,386 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-12 22:31:06,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651518572] [2021-06-12 22:31:06,386 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-12 22:31:06,386 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:31:06,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-12 22:31:06,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1374, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 22:31:06,387 INFO L87 Difference]: Start difference. First operand 7142 states and 21669 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:31:08,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:31:08,461 INFO L93 Difference]: Finished difference Result 8113 states and 24525 transitions. [2021-06-12 22:31:08,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-12 22:31:08,461 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-12 22:31:08,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:31:08,471 INFO L225 Difference]: With dead ends: 8113 [2021-06-12 22:31:08,471 INFO L226 Difference]: Without dead ends: 8060 [2021-06-12 22:31:08,472 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 851 ImplicationChecksByTransitivity, 1955.3ms TimeCoverageRelationStatistics Valid=270, Invalid=3270, Unknown=0, NotChecked=0, Total=3540 [2021-06-12 22:31:08,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8060 states. [2021-06-12 22:31:08,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8060 to 7150. [2021-06-12 22:31:08,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7150 states, 7149 states have (on average 3.0330116100153868) internal successors, (21683), 7149 states have internal predecessors, (21683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:31:08,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7150 states to 7150 states and 21683 transitions. [2021-06-12 22:31:08,558 INFO L78 Accepts]: Start accepts. Automaton has 7150 states and 21683 transitions. Word has length 48 [2021-06-12 22:31:08,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:31:08,558 INFO L482 AbstractCegarLoop]: Abstraction has 7150 states and 21683 transitions. [2021-06-12 22:31:08,558 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:31:08,558 INFO L276 IsEmpty]: Start isEmpty. Operand 7150 states and 21683 transitions. [2021-06-12 22:31:08,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-12 22:31:08,565 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:31:08,565 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:31:08,765 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable248,246 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:31:08,765 INFO L430 AbstractCegarLoop]: === Iteration 250 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:31:08,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:31:08,766 INFO L82 PathProgramCache]: Analyzing trace with hash 532067872, now seen corresponding path program 160 times [2021-06-12 22:31:08,766 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:31:08,766 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682900124] [2021-06-12 22:31:08,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:31:08,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:31:09,163 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:31:09,163 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:31:09,163 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682900124] [2021-06-12 22:31:09,163 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [682900124] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:31:09,163 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [198761132] [2021-06-12 22:31:09,163 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:31:09,194 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:31:09,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:31:09,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-12 22:31:09,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:31:09,320 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:31:09,320 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:31:09,333 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:31:09,333 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:31:09,333 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-12 22:31:09,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-12 22:31:09,490 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:31:09,501 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:31:09,501 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:31:09,502 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:32 [2021-06-12 22:31:09,949 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:31:09,949 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [198761132] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:31:09,949 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:31:09,949 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-12 22:31:09,949 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837422677] [2021-06-12 22:31:09,950 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-12 22:31:09,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:31:09,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-12 22:31:09,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1372, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 22:31:09,950 INFO L87 Difference]: Start difference. First operand 7150 states and 21683 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:31:11,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:31:11,538 INFO L93 Difference]: Finished difference Result 9289 states and 27911 transitions. [2021-06-12 22:31:11,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-12 22:31:11,539 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-12 22:31:11,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:31:11,550 INFO L225 Difference]: With dead ends: 9289 [2021-06-12 22:31:11,550 INFO L226 Difference]: Without dead ends: 9246 [2021-06-12 22:31:11,551 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 814 ImplicationChecksByTransitivity, 1762.2ms TimeCoverageRelationStatistics Valid=231, Invalid=3075, Unknown=0, NotChecked=0, Total=3306 [2021-06-12 22:31:11,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9246 states. [2021-06-12 22:31:11,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9246 to 7142. [2021-06-12 22:31:11,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7142 states, 7141 states have (on average 3.0343089203192832) internal successors, (21668), 7141 states have internal predecessors, (21668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:31:11,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7142 states to 7142 states and 21668 transitions. [2021-06-12 22:31:11,653 INFO L78 Accepts]: Start accepts. Automaton has 7142 states and 21668 transitions. Word has length 48 [2021-06-12 22:31:11,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:31:11,653 INFO L482 AbstractCegarLoop]: Abstraction has 7142 states and 21668 transitions. [2021-06-12 22:31:11,653 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:31:11,653 INFO L276 IsEmpty]: Start isEmpty. Operand 7142 states and 21668 transitions. [2021-06-12 22:31:11,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-12 22:31:11,660 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:31:11,660 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:31:11,864 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 247 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable249 [2021-06-12 22:31:11,865 INFO L430 AbstractCegarLoop]: === Iteration 251 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:31:11,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:31:11,865 INFO L82 PathProgramCache]: Analyzing trace with hash -747846064, now seen corresponding path program 161 times [2021-06-12 22:31:11,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:31:11,865 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663022710] [2021-06-12 22:31:11,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:31:11,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:31:12,300 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:31:12,301 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:31:12,301 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663022710] [2021-06-12 22:31:12,301 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [663022710] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:31:12,301 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1486310826] [2021-06-12 22:31:12,301 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:31:12,332 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 22:31:12,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:31:12,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 44 conjunts are in the unsatisfiable core [2021-06-12 22:31:12,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:31:12,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:31:12,458 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:31:12,470 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:31:12,471 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:31:12,471 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-12 22:31:12,628 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-12 22:31:12,629 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:31:12,640 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:31:12,641 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:31:12,641 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:32 [2021-06-12 22:31:13,057 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:31:13,058 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1486310826] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:31:13,058 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:31:13,058 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-12 22:31:13,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385498642] [2021-06-12 22:31:13,058 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-12 22:31:13,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:31:13,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-12 22:31:13,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1374, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 22:31:13,058 INFO L87 Difference]: Start difference. First operand 7142 states and 21668 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:31:15,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:31:15,164 INFO L93 Difference]: Finished difference Result 8121 states and 24542 transitions. [2021-06-12 22:31:15,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-12 22:31:15,165 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-12 22:31:15,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:31:15,174 INFO L225 Difference]: With dead ends: 8121 [2021-06-12 22:31:15,174 INFO L226 Difference]: Without dead ends: 8068 [2021-06-12 22:31:15,174 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 851 ImplicationChecksByTransitivity, 2054.3ms TimeCoverageRelationStatistics Valid=270, Invalid=3270, Unknown=0, NotChecked=0, Total=3540 [2021-06-12 22:31:15,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8068 states. [2021-06-12 22:31:15,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8068 to 7154. [2021-06-12 22:31:15,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7154 states, 7153 states have (on average 3.0328533482454914) internal successors, (21694), 7153 states have internal predecessors, (21694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:31:15,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7154 states to 7154 states and 21694 transitions. [2021-06-12 22:31:15,258 INFO L78 Accepts]: Start accepts. Automaton has 7154 states and 21694 transitions. Word has length 48 [2021-06-12 22:31:15,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:31:15,258 INFO L482 AbstractCegarLoop]: Abstraction has 7154 states and 21694 transitions. [2021-06-12 22:31:15,258 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:31:15,259 INFO L276 IsEmpty]: Start isEmpty. Operand 7154 states and 21694 transitions. [2021-06-12 22:31:15,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-12 22:31:15,266 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:31:15,266 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:31:15,466 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable250,248 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:31:15,466 INFO L430 AbstractCegarLoop]: === Iteration 252 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:31:15,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:31:15,466 INFO L82 PathProgramCache]: Analyzing trace with hash 1015823866, now seen corresponding path program 162 times [2021-06-12 22:31:15,466 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:31:15,466 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396327490] [2021-06-12 22:31:15,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:31:15,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:31:15,858 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:31:15,858 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:31:15,858 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396327490] [2021-06-12 22:31:15,858 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396327490] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:31:15,858 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2037427352] [2021-06-12 22:31:15,858 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:31:15,891 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 22:31:15,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:31:15,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-12 22:31:15,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:31:16,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:31:16,016 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:31:16,028 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:31:16,029 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:31:16,029 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-12 22:31:16,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:31:16,186 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:31:16,197 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:31:16,198 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:31:16,198 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-06-12 22:31:16,609 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:31:16,609 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2037427352] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:31:16,610 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:31:16,610 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-12 22:31:16,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293361280] [2021-06-12 22:31:16,610 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-12 22:31:16,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:31:16,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-12 22:31:16,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1372, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 22:31:16,610 INFO L87 Difference]: Start difference. First operand 7154 states and 21694 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:31:18,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:31:18,566 INFO L93 Difference]: Finished difference Result 9297 states and 27930 transitions. [2021-06-12 22:31:18,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-12 22:31:18,566 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-12 22:31:18,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:31:18,578 INFO L225 Difference]: With dead ends: 9297 [2021-06-12 22:31:18,578 INFO L226 Difference]: Without dead ends: 9244 [2021-06-12 22:31:18,578 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 814 ImplicationChecksByTransitivity, 1742.7ms TimeCoverageRelationStatistics Valid=231, Invalid=3075, Unknown=0, NotChecked=0, Total=3306 [2021-06-12 22:31:18,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9244 states. [2021-06-12 22:31:18,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9244 to 7140. [2021-06-12 22:31:18,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7140 states, 7139 states have (on average 3.03445860764813) internal successors, (21663), 7139 states have internal predecessors, (21663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:31:18,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7140 states to 7140 states and 21663 transitions. [2021-06-12 22:31:18,684 INFO L78 Accepts]: Start accepts. Automaton has 7140 states and 21663 transitions. Word has length 48 [2021-06-12 22:31:18,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:31:18,684 INFO L482 AbstractCegarLoop]: Abstraction has 7140 states and 21663 transitions. [2021-06-12 22:31:18,684 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:31:18,684 INFO L276 IsEmpty]: Start isEmpty. Operand 7140 states and 21663 transitions. [2021-06-12 22:31:18,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-12 22:31:18,692 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:31:18,692 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:31:18,892 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable251,249 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:31:18,893 INFO L430 AbstractCegarLoop]: === Iteration 253 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:31:18,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:31:18,893 INFO L82 PathProgramCache]: Analyzing trace with hash 470125614, now seen corresponding path program 163 times [2021-06-12 22:31:18,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:31:18,893 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581607773] [2021-06-12 22:31:18,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:31:18,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:31:19,293 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:31:19,293 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:31:19,294 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581607773] [2021-06-12 22:31:19,294 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [581607773] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:31:19,294 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2135790872] [2021-06-12 22:31:19,294 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:31:19,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:31:19,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-12 22:31:19,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:31:19,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:31:19,451 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:31:19,463 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:31:19,464 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:31:19,464 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-12 22:31:19,620 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-12 22:31:19,621 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:31:19,632 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:31:19,632 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:31:19,632 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:32 [2021-06-12 22:31:20,093 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:31:20,093 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2135790872] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:31:20,093 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:31:20,093 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-12 22:31:20,093 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796564593] [2021-06-12 22:31:20,093 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-12 22:31:20,093 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:31:20,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-12 22:31:20,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1374, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 22:31:20,094 INFO L87 Difference]: Start difference. First operand 7140 states and 21663 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:31:22,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:31:22,073 INFO L93 Difference]: Finished difference Result 8094 states and 24477 transitions. [2021-06-12 22:31:22,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-12 22:31:22,074 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-12 22:31:22,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:31:22,084 INFO L225 Difference]: With dead ends: 8094 [2021-06-12 22:31:22,084 INFO L226 Difference]: Without dead ends: 8054 [2021-06-12 22:31:22,084 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 851 ImplicationChecksByTransitivity, 2003.9ms TimeCoverageRelationStatistics Valid=270, Invalid=3270, Unknown=0, NotChecked=0, Total=3540 [2021-06-12 22:31:22,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8054 states. [2021-06-12 22:31:22,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8054 to 7144. [2021-06-12 22:31:22,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7144 states, 7143 states have (on average 3.033739325213496) internal successors, (21670), 7143 states have internal predecessors, (21670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:31:22,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7144 states to 7144 states and 21670 transitions. [2021-06-12 22:31:22,191 INFO L78 Accepts]: Start accepts. Automaton has 7144 states and 21670 transitions. Word has length 48 [2021-06-12 22:31:22,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:31:22,191 INFO L482 AbstractCegarLoop]: Abstraction has 7144 states and 21670 transitions. [2021-06-12 22:31:22,191 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:31:22,191 INFO L276 IsEmpty]: Start isEmpty. Operand 7144 states and 21670 transitions. [2021-06-12 22:31:22,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-12 22:31:22,198 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:31:22,198 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:31:22,398 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable252,250 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:31:22,399 INFO L430 AbstractCegarLoop]: === Iteration 254 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:31:22,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:31:22,399 INFO L82 PathProgramCache]: Analyzing trace with hash -406056850, now seen corresponding path program 164 times [2021-06-12 22:31:22,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:31:22,399 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907408507] [2021-06-12 22:31:22,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:31:22,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:31:22,796 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:31:22,796 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:31:22,797 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907408507] [2021-06-12 22:31:22,797 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907408507] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:31:22,797 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [593535067] [2021-06-12 22:31:22,797 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:31:22,828 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:31:22,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:31:22,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-12 22:31:22,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:31:22,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:31:22,954 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:31:22,966 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:31:22,967 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:31:22,967 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-12 22:31:23,123 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:31:23,124 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:31:23,135 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:31:23,135 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:31:23,135 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-06-12 22:31:23,547 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:31:23,547 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [593535067] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:31:23,547 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:31:23,547 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-12 22:31:23,547 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858182421] [2021-06-12 22:31:23,547 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-12 22:31:23,547 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:31:23,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-12 22:31:23,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1372, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 22:31:23,548 INFO L87 Difference]: Start difference. First operand 7144 states and 21670 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:31:25,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:31:25,356 INFO L93 Difference]: Finished difference Result 9283 states and 27898 transitions. [2021-06-12 22:31:25,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-12 22:31:25,356 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-12 22:31:25,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:31:25,367 INFO L225 Difference]: With dead ends: 9283 [2021-06-12 22:31:25,368 INFO L226 Difference]: Without dead ends: 9236 [2021-06-12 22:31:25,368 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 814 ImplicationChecksByTransitivity, 1716.7ms TimeCoverageRelationStatistics Valid=231, Invalid=3075, Unknown=0, NotChecked=0, Total=3306 [2021-06-12 22:31:25,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9236 states. [2021-06-12 22:31:25,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9236 to 7132. [2021-06-12 22:31:25,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7132 states, 7131 states have (on average 3.035759360538494) internal successors, (21648), 7131 states have internal predecessors, (21648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:31:25,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7132 states to 7132 states and 21648 transitions. [2021-06-12 22:31:25,471 INFO L78 Accepts]: Start accepts. Automaton has 7132 states and 21648 transitions. Word has length 48 [2021-06-12 22:31:25,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:31:25,472 INFO L482 AbstractCegarLoop]: Abstraction has 7132 states and 21648 transitions. [2021-06-12 22:31:25,472 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:31:25,472 INFO L276 IsEmpty]: Start isEmpty. Operand 7132 states and 21648 transitions. [2021-06-12 22:31:25,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-12 22:31:25,479 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:31:25,479 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:31:25,679 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable253,251 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:31:25,680 INFO L430 AbstractCegarLoop]: === Iteration 255 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:31:25,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:31:25,680 INFO L82 PathProgramCache]: Analyzing trace with hash 1463452044, now seen corresponding path program 165 times [2021-06-12 22:31:25,680 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:31:25,680 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453023180] [2021-06-12 22:31:25,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:31:25,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:31:26,099 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:31:26,099 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:31:26,099 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453023180] [2021-06-12 22:31:26,099 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [453023180] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:31:26,100 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2072819899] [2021-06-12 22:31:26,100 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:31:26,132 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 22:31:26,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:31:26,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-12 22:31:26,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:31:26,257 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:31:26,258 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:31:26,270 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:31:26,270 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:31:26,271 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-12 22:31:26,425 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-12 22:31:26,426 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:31:26,437 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:31:26,437 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:31:26,437 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:32 [2021-06-12 22:31:26,853 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:31:26,853 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2072819899] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:31:26,853 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:31:26,853 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-12 22:31:26,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225144597] [2021-06-12 22:31:26,853 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-12 22:31:26,853 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:31:26,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-12 22:31:26,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1374, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 22:31:26,854 INFO L87 Difference]: Start difference. First operand 7132 states and 21648 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:31:28,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:31:28,790 INFO L93 Difference]: Finished difference Result 8092 states and 24475 transitions. [2021-06-12 22:31:28,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-12 22:31:28,791 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-12 22:31:28,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:31:28,801 INFO L225 Difference]: With dead ends: 8092 [2021-06-12 22:31:28,801 INFO L226 Difference]: Without dead ends: 8052 [2021-06-12 22:31:28,802 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 851 ImplicationChecksByTransitivity, 2027.2ms TimeCoverageRelationStatistics Valid=270, Invalid=3270, Unknown=0, NotChecked=0, Total=3540 [2021-06-12 22:31:28,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8052 states. [2021-06-12 22:31:28,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8052 to 7138. [2021-06-12 22:31:28,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7138 states, 7137 states have (on average 3.0350287235533138) internal successors, (21661), 7137 states have internal predecessors, (21661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:31:28,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7138 states to 7138 states and 21661 transitions. [2021-06-12 22:31:28,887 INFO L78 Accepts]: Start accepts. Automaton has 7138 states and 21661 transitions. Word has length 48 [2021-06-12 22:31:28,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:31:28,887 INFO L482 AbstractCegarLoop]: Abstraction has 7138 states and 21661 transitions. [2021-06-12 22:31:28,887 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:31:28,887 INFO L276 IsEmpty]: Start isEmpty. Operand 7138 states and 21661 transitions. [2021-06-12 22:31:28,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-12 22:31:28,896 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:31:28,896 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:31:29,097 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 252 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable254 [2021-06-12 22:31:29,097 INFO L430 AbstractCegarLoop]: === Iteration 256 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:31:29,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:31:29,098 INFO L82 PathProgramCache]: Analyzing trace with hash -1067845322, now seen corresponding path program 166 times [2021-06-12 22:31:29,098 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:31:29,098 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762576887] [2021-06-12 22:31:29,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:31:29,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:31:29,499 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:31:29,499 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:31:29,499 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762576887] [2021-06-12 22:31:29,499 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1762576887] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:31:29,499 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1326967396] [2021-06-12 22:31:29,499 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:31:29,533 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:31:29,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:31:29,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-12 22:31:29,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:31:29,696 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:31:29,697 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:31:29,709 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:31:29,710 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:31:29,710 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-12 22:31:29,866 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-12 22:31:29,866 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:31:29,877 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:31:29,878 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:31:29,878 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:32 [2021-06-12 22:31:30,284 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:31:30,284 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1326967396] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:31:30,284 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:31:30,284 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-12 22:31:30,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902556699] [2021-06-12 22:31:30,284 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-12 22:31:30,284 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:31:30,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-12 22:31:30,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1372, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 22:31:30,285 INFO L87 Difference]: Start difference. First operand 7138 states and 21661 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:31:31,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:31:31,779 INFO L93 Difference]: Finished difference Result 9281 states and 27897 transitions. [2021-06-12 22:31:31,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-12 22:31:31,780 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-12 22:31:31,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:31:31,793 INFO L225 Difference]: With dead ends: 9281 [2021-06-12 22:31:31,793 INFO L226 Difference]: Without dead ends: 9193 [2021-06-12 22:31:31,793 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 814 ImplicationChecksByTransitivity, 1759.2ms TimeCoverageRelationStatistics Valid=231, Invalid=3075, Unknown=0, NotChecked=0, Total=3306 [2021-06-12 22:31:31,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9193 states. [2021-06-12 22:31:31,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9193 to 7089. [2021-06-12 22:31:31,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7089 states, 7088 states have (on average 3.0413374717832955) internal successors, (21557), 7088 states have internal predecessors, (21557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:31:31,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7089 states to 7089 states and 21557 transitions. [2021-06-12 22:31:31,923 INFO L78 Accepts]: Start accepts. Automaton has 7089 states and 21557 transitions. Word has length 48 [2021-06-12 22:31:31,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:31:31,923 INFO L482 AbstractCegarLoop]: Abstraction has 7089 states and 21557 transitions. [2021-06-12 22:31:31,923 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:31:31,923 INFO L276 IsEmpty]: Start isEmpty. Operand 7089 states and 21557 transitions. [2021-06-12 22:31:31,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-12 22:31:31,930 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:31:31,930 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:31:32,132 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 253 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable255 [2021-06-12 22:31:32,132 INFO L430 AbstractCegarLoop]: === Iteration 257 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:31:32,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:31:32,133 INFO L82 PathProgramCache]: Analyzing trace with hash 1225861968, now seen corresponding path program 167 times [2021-06-12 22:31:32,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:31:32,133 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333009126] [2021-06-12 22:31:32,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:31:32,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:31:32,553 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:31:32,553 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:31:32,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333009126] [2021-06-12 22:31:32,553 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1333009126] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:31:32,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1974362850] [2021-06-12 22:31:32,553 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:31:32,586 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 22:31:32,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:31:32,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-12 22:31:32,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:31:32,712 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:31:32,713 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:31:32,725 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:31:32,726 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:31:32,726 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-12 22:31:32,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:31:32,882 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:31:32,893 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:31:32,894 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:31:32,894 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-06-12 22:31:33,298 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:31:33,298 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1974362850] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:31:33,298 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:31:33,298 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-12 22:31:33,298 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578139568] [2021-06-12 22:31:33,299 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-12 22:31:33,299 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:31:33,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-12 22:31:33,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1372, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 22:31:33,299 INFO L87 Difference]: Start difference. First operand 7089 states and 21557 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:31:34,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:31:34,766 INFO L93 Difference]: Finished difference Result 9340 states and 28059 transitions. [2021-06-12 22:31:34,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-12 22:31:34,767 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-12 22:31:34,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:31:34,778 INFO L225 Difference]: With dead ends: 9340 [2021-06-12 22:31:34,778 INFO L226 Difference]: Without dead ends: 9222 [2021-06-12 22:31:34,779 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 812 ImplicationChecksByTransitivity, 1743.1ms TimeCoverageRelationStatistics Valid=230, Invalid=3076, Unknown=0, NotChecked=0, Total=3306 [2021-06-12 22:31:34,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9222 states. [2021-06-12 22:31:34,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9222 to 7109. [2021-06-12 22:31:34,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7109 states, 7108 states have (on average 3.0382667416994935) internal successors, (21596), 7108 states have internal predecessors, (21596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:31:34,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7109 states to 7109 states and 21596 transitions. [2021-06-12 22:31:34,877 INFO L78 Accepts]: Start accepts. Automaton has 7109 states and 21596 transitions. Word has length 48 [2021-06-12 22:31:34,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:31:34,877 INFO L482 AbstractCegarLoop]: Abstraction has 7109 states and 21596 transitions. [2021-06-12 22:31:34,878 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:31:34,878 INFO L276 IsEmpty]: Start isEmpty. Operand 7109 states and 21596 transitions. [2021-06-12 22:31:34,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-12 22:31:34,885 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:31:34,885 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:31:35,085 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable256,254 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:31:35,085 INFO L430 AbstractCegarLoop]: === Iteration 258 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:31:35,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:31:35,086 INFO L82 PathProgramCache]: Analyzing trace with hash 1333312336, now seen corresponding path program 168 times [2021-06-12 22:31:35,086 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:31:35,086 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426819011] [2021-06-12 22:31:35,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:31:35,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:31:35,495 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:31:35,495 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:31:35,495 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426819011] [2021-06-12 22:31:35,495 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426819011] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:31:35,495 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [848117029] [2021-06-12 22:31:35,495 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:31:35,528 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 22:31:35,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:31:35,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-12 22:31:35,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:31:35,657 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:31:35,658 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:31:35,670 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:31:35,671 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:31:35,671 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-12 22:31:35,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:31:35,839 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:31:35,850 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:31:35,851 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:31:35,851 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-06-12 22:31:36,321 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:31:36,321 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [848117029] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:31:36,321 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:31:36,321 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 40 [2021-06-12 22:31:36,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016242981] [2021-06-12 22:31:36,321 INFO L462 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-06-12 22:31:36,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:31:36,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-06-12 22:31:36,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=1527, Unknown=0, NotChecked=0, Total=1640 [2021-06-12 22:31:36,322 INFO L87 Difference]: Start difference. First operand 7109 states and 21596 transitions. Second operand has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:31:38,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:31:38,533 INFO L93 Difference]: Finished difference Result 8067 states and 24420 transitions. [2021-06-12 22:31:38,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-12 22:31:38,534 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-12 22:31:38,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:31:38,544 INFO L225 Difference]: With dead ends: 8067 [2021-06-12 22:31:38,544 INFO L226 Difference]: Without dead ends: 8027 [2021-06-12 22:31:38,545 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 896 ImplicationChecksByTransitivity, 2096.7ms TimeCoverageRelationStatistics Valid=270, Invalid=3512, Unknown=0, NotChecked=0, Total=3782 [2021-06-12 22:31:38,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8027 states. [2021-06-12 22:31:38,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8027 to 7121. [2021-06-12 22:31:38,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7121 states, 7120 states have (on average 3.0372191011235956) internal successors, (21625), 7120 states have internal predecessors, (21625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:31:38,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7121 states to 7121 states and 21625 transitions. [2021-06-12 22:31:38,632 INFO L78 Accepts]: Start accepts. Automaton has 7121 states and 21625 transitions. Word has length 48 [2021-06-12 22:31:38,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:31:38,632 INFO L482 AbstractCegarLoop]: Abstraction has 7121 states and 21625 transitions. [2021-06-12 22:31:38,632 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:31:38,632 INFO L276 IsEmpty]: Start isEmpty. Operand 7121 states and 21625 transitions. [2021-06-12 22:31:38,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-12 22:31:38,640 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:31:38,640 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:31:38,840 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 255 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable257 [2021-06-12 22:31:38,840 INFO L430 AbstractCegarLoop]: === Iteration 259 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:31:38,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:31:38,840 INFO L82 PathProgramCache]: Analyzing trace with hash 457129872, now seen corresponding path program 169 times [2021-06-12 22:31:38,840 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:31:38,840 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072225973] [2021-06-12 22:31:38,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:31:38,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:31:39,245 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:31:39,246 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:31:39,246 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072225973] [2021-06-12 22:31:39,246 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072225973] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:31:39,246 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1182271505] [2021-06-12 22:31:39,246 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:31:39,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:31:39,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-12 22:31:39,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:31:39,458 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:31:39,459 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:31:39,471 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:31:39,471 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:31:39,471 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-12 22:31:39,631 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:31:39,631 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:31:39,642 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:31:39,643 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:31:39,643 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-06-12 22:31:40,103 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:31:40,103 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1182271505] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:31:40,103 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:31:40,103 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 40 [2021-06-12 22:31:40,103 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762821516] [2021-06-12 22:31:40,104 INFO L462 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-06-12 22:31:40,104 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:31:40,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-06-12 22:31:40,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1525, Unknown=0, NotChecked=0, Total=1640 [2021-06-12 22:31:40,104 INFO L87 Difference]: Start difference. First operand 7121 states and 21625 transitions. Second operand has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:31:41,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:31:41,939 INFO L93 Difference]: Finished difference Result 9269 states and 27873 transitions. [2021-06-12 22:31:41,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-12 22:31:41,940 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-12 22:31:41,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:31:41,951 INFO L225 Difference]: With dead ends: 9269 [2021-06-12 22:31:41,951 INFO L226 Difference]: Without dead ends: 9230 [2021-06-12 22:31:41,951 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 857 ImplicationChecksByTransitivity, 1860.5ms TimeCoverageRelationStatistics Valid=235, Invalid=3305, Unknown=0, NotChecked=0, Total=3540 [2021-06-12 22:31:41,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9230 states. [2021-06-12 22:31:42,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9230 to 7117. [2021-06-12 22:31:42,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7117 states, 7116 states have (on average 3.037380550871276) internal successors, (21614), 7116 states have internal predecessors, (21614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:31:42,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7117 states to 7117 states and 21614 transitions. [2021-06-12 22:31:42,049 INFO L78 Accepts]: Start accepts. Automaton has 7117 states and 21614 transitions. Word has length 48 [2021-06-12 22:31:42,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:31:42,049 INFO L482 AbstractCegarLoop]: Abstraction has 7117 states and 21614 transitions. [2021-06-12 22:31:42,049 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:31:42,049 INFO L276 IsEmpty]: Start isEmpty. Operand 7117 states and 21614 transitions. [2021-06-12 22:31:42,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-12 22:31:42,056 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:31:42,057 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:31:42,259 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable258,256 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:31:42,259 INFO L430 AbstractCegarLoop]: === Iteration 260 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:31:42,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:31:42,260 INFO L82 PathProgramCache]: Analyzing trace with hash 598845012, now seen corresponding path program 170 times [2021-06-12 22:31:42,260 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:31:42,260 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956091487] [2021-06-12 22:31:42,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:31:42,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:31:42,668 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:31:42,668 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:31:42,668 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956091487] [2021-06-12 22:31:42,668 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1956091487] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:31:42,668 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [611946372] [2021-06-12 22:31:42,669 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:31:42,701 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:31:42,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:31:42,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-12 22:31:42,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:31:42,835 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:31:42,835 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:31:42,847 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:31:42,848 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:31:42,848 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-12 22:31:43,006 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:31:43,007 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:31:43,018 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:31:43,019 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:31:43,019 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-06-12 22:31:43,477 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:31:43,478 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [611946372] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:31:43,478 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:31:43,478 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 40 [2021-06-12 22:31:43,478 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932364870] [2021-06-12 22:31:43,478 INFO L462 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-06-12 22:31:43,478 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:31:43,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-06-12 22:31:43,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1525, Unknown=0, NotChecked=0, Total=1640 [2021-06-12 22:31:43,479 INFO L87 Difference]: Start difference. First operand 7117 states and 21614 transitions. Second operand has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:31:45,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:31:45,280 INFO L93 Difference]: Finished difference Result 9283 states and 27906 transitions. [2021-06-12 22:31:45,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-12 22:31:45,280 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-12 22:31:45,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:31:45,292 INFO L225 Difference]: With dead ends: 9283 [2021-06-12 22:31:45,292 INFO L226 Difference]: Without dead ends: 9226 [2021-06-12 22:31:45,292 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 856 ImplicationChecksByTransitivity, 1819.4ms TimeCoverageRelationStatistics Valid=235, Invalid=3305, Unknown=0, NotChecked=0, Total=3540 [2021-06-12 22:31:45,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9226 states. [2021-06-12 22:31:45,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9226 to 7113. [2021-06-12 22:31:45,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7113 states, 7112 states have (on average 3.0375421822272215) internal successors, (21603), 7112 states have internal predecessors, (21603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:31:45,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7113 states to 7113 states and 21603 transitions. [2021-06-12 22:31:45,391 INFO L78 Accepts]: Start accepts. Automaton has 7113 states and 21603 transitions. Word has length 48 [2021-06-12 22:31:45,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:31:45,391 INFO L482 AbstractCegarLoop]: Abstraction has 7113 states and 21603 transitions. [2021-06-12 22:31:45,391 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:31:45,391 INFO L276 IsEmpty]: Start isEmpty. Operand 7113 states and 21603 transitions. [2021-06-12 22:31:45,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-12 22:31:45,399 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:31:45,399 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:31:45,601 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 257 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable259 [2021-06-12 22:31:45,601 INFO L430 AbstractCegarLoop]: === Iteration 261 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:31:45,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:31:45,601 INFO L82 PathProgramCache]: Analyzing trace with hash -684302448, now seen corresponding path program 171 times [2021-06-12 22:31:45,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:31:45,602 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471857497] [2021-06-12 22:31:45,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:31:45,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:31:46,012 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:31:46,012 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:31:46,012 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471857497] [2021-06-12 22:31:46,012 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1471857497] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:31:46,012 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1069073819] [2021-06-12 22:31:46,013 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:31:46,046 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 22:31:46,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:31:46,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-12 22:31:46,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:31:46,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:31:46,175 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:31:46,187 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:31:46,187 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:31:46,187 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-12 22:31:46,433 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-12 22:31:46,434 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:31:46,445 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:31:46,445 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:31:46,445 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:32 [2021-06-12 22:31:46,933 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:31:46,933 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1069073819] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:31:46,933 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:31:46,933 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 23] total 42 [2021-06-12 22:31:46,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97647649] [2021-06-12 22:31:46,934 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-06-12 22:31:46,934 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:31:46,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-06-12 22:31:46,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=1679, Unknown=0, NotChecked=0, Total=1806 [2021-06-12 22:31:46,934 INFO L87 Difference]: Start difference. First operand 7113 states and 21603 transitions. Second operand has 43 states, 43 states have (on average 2.046511627906977) internal successors, (88), 42 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:31:48,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:31:48,397 INFO L93 Difference]: Finished difference Result 9296 states and 27938 transitions. [2021-06-12 22:31:48,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-12 22:31:48,398 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.046511627906977) internal successors, (88), 42 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-12 22:31:48,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:31:48,410 INFO L225 Difference]: With dead ends: 9296 [2021-06-12 22:31:48,410 INFO L226 Difference]: Without dead ends: 9210 [2021-06-12 22:31:48,411 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1003 ImplicationChecksByTransitivity, 1938.3ms TimeCoverageRelationStatistics Valid=255, Invalid=3527, Unknown=0, NotChecked=0, Total=3782 [2021-06-12 22:31:48,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9210 states. [2021-06-12 22:31:48,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9210 to 7093. [2021-06-12 22:31:48,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7093 states, 7092 states have (on average 3.0406091370558377) internal successors, (21564), 7092 states have internal predecessors, (21564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:31:48,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7093 states to 7093 states and 21564 transitions. [2021-06-12 22:31:48,516 INFO L78 Accepts]: Start accepts. Automaton has 7093 states and 21564 transitions. Word has length 48 [2021-06-12 22:31:48,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:31:48,516 INFO L482 AbstractCegarLoop]: Abstraction has 7093 states and 21564 transitions. [2021-06-12 22:31:48,516 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 2.046511627906977) internal successors, (88), 42 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:31:48,516 INFO L276 IsEmpty]: Start isEmpty. Operand 7093 states and 21564 transitions. [2021-06-12 22:31:48,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-12 22:31:48,524 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:31:48,524 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:31:48,724 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable260,258 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:31:48,724 INFO L430 AbstractCegarLoop]: === Iteration 262 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:31:48,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:31:48,725 INFO L82 PathProgramCache]: Analyzing trace with hash -1426424808, now seen corresponding path program 172 times [2021-06-12 22:31:48,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:31:48,725 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42361240] [2021-06-12 22:31:48,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:31:48,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:31:49,119 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:31:49,120 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:31:49,120 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42361240] [2021-06-12 22:31:49,120 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42361240] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:31:49,120 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1655610495] [2021-06-12 22:31:49,120 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:31:49,150 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:31:49,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:31:49,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-12 22:31:49,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:31:49,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:31:49,312 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:31:49,325 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:31:49,325 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:31:49,325 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-12 22:31:49,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:31:49,482 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:31:49,492 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:31:49,493 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:31:49,493 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-06-12 22:31:49,901 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:31:49,901 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1655610495] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:31:49,901 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:31:49,901 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-12 22:31:49,901 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733654549] [2021-06-12 22:31:49,902 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-12 22:31:49,902 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:31:49,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-12 22:31:49,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1372, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 22:31:49,902 INFO L87 Difference]: Start difference. First operand 7093 states and 21564 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:31:51,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:31:51,433 INFO L93 Difference]: Finished difference Result 9324 states and 28011 transitions. [2021-06-12 22:31:51,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-12 22:31:51,434 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-12 22:31:51,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:31:51,445 INFO L225 Difference]: With dead ends: 9324 [2021-06-12 22:31:51,446 INFO L226 Difference]: Without dead ends: 9189 [2021-06-12 22:31:51,446 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 812 ImplicationChecksByTransitivity, 1717.2ms TimeCoverageRelationStatistics Valid=230, Invalid=3076, Unknown=0, NotChecked=0, Total=3306 [2021-06-12 22:31:51,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9189 states. [2021-06-12 22:31:51,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9189 to 7089. [2021-06-12 22:31:51,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7089 states, 7088 states have (on average 3.041196388261851) internal successors, (21556), 7088 states have internal predecessors, (21556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:31:51,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7089 states to 7089 states and 21556 transitions. [2021-06-12 22:31:51,566 INFO L78 Accepts]: Start accepts. Automaton has 7089 states and 21556 transitions. Word has length 48 [2021-06-12 22:31:51,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:31:51,566 INFO L482 AbstractCegarLoop]: Abstraction has 7089 states and 21556 transitions. [2021-06-12 22:31:51,566 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:31:51,566 INFO L276 IsEmpty]: Start isEmpty. Operand 7089 states and 21556 transitions. [2021-06-12 22:31:51,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-12 22:31:51,573 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:31:51,573 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:31:51,773 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable261,259 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:31:51,773 INFO L430 AbstractCegarLoop]: === Iteration 263 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:31:51,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:31:51,774 INFO L82 PathProgramCache]: Analyzing trace with hash 1141337112, now seen corresponding path program 173 times [2021-06-12 22:31:51,774 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:31:51,774 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578811687] [2021-06-12 22:31:51,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:31:51,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:31:52,183 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:31:52,183 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:31:52,183 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578811687] [2021-06-12 22:31:52,183 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1578811687] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:31:52,183 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1118883774] [2021-06-12 22:31:52,183 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:31:52,214 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 22:31:52,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:31:52,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-12 22:31:52,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:31:52,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:31:52,341 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:31:52,354 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:31:52,354 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:31:52,354 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-12 22:31:52,514 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:31:52,515 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:31:52,525 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:31:52,526 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:31:52,526 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-06-12 22:31:52,937 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:31:52,938 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1118883774] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:31:52,938 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:31:52,938 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-12 22:31:52,938 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358706846] [2021-06-12 22:31:52,938 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-12 22:31:52,938 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:31:52,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-12 22:31:52,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1372, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 22:31:52,938 INFO L87 Difference]: Start difference. First operand 7089 states and 21556 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:31:54,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:31:54,436 INFO L93 Difference]: Finished difference Result 9380 states and 28151 transitions. [2021-06-12 22:31:54,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-12 22:31:54,437 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-12 22:31:54,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:31:54,448 INFO L225 Difference]: With dead ends: 9380 [2021-06-12 22:31:54,448 INFO L226 Difference]: Without dead ends: 9262 [2021-06-12 22:31:54,449 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 812 ImplicationChecksByTransitivity, 1747.7ms TimeCoverageRelationStatistics Valid=230, Invalid=3076, Unknown=0, NotChecked=0, Total=3306 [2021-06-12 22:31:54,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9262 states. [2021-06-12 22:31:54,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9262 to 7167. [2021-06-12 22:31:54,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7167 states, 7166 states have (on average 3.0337705833100754) internal successors, (21740), 7166 states have internal predecessors, (21740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:31:54,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7167 states to 7167 states and 21740 transitions. [2021-06-12 22:31:54,549 INFO L78 Accepts]: Start accepts. Automaton has 7167 states and 21740 transitions. Word has length 48 [2021-06-12 22:31:54,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:31:54,549 INFO L482 AbstractCegarLoop]: Abstraction has 7167 states and 21740 transitions. [2021-06-12 22:31:54,549 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:31:54,549 INFO L276 IsEmpty]: Start isEmpty. Operand 7167 states and 21740 transitions. [2021-06-12 22:31:54,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-12 22:31:54,556 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:31:54,556 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:31:54,756 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable262,260 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:31:54,756 INFO L430 AbstractCegarLoop]: === Iteration 264 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:31:54,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:31:54,757 INFO L82 PathProgramCache]: Analyzing trace with hash -240099806, now seen corresponding path program 174 times [2021-06-12 22:31:54,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:31:54,757 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205471373] [2021-06-12 22:31:54,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:31:54,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:31:55,173 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:31:55,173 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:31:55,173 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205471373] [2021-06-12 22:31:55,173 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1205471373] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:31:55,173 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1854736195] [2021-06-12 22:31:55,173 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:31:55,205 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 22:31:55,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:31:55,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-12 22:31:55,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:31:55,335 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:31:55,336 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:31:55,348 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:31:55,349 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:31:55,349 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-12 22:31:55,510 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:31:55,511 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:31:55,522 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:31:55,523 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:31:55,523 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-06-12 22:31:55,995 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:31:55,996 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1854736195] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:31:55,996 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:31:55,996 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 40 [2021-06-12 22:31:55,996 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730261258] [2021-06-12 22:31:55,996 INFO L462 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-06-12 22:31:55,996 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:31:55,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-06-12 22:31:55,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=1527, Unknown=0, NotChecked=0, Total=1640 [2021-06-12 22:31:55,996 INFO L87 Difference]: Start difference. First operand 7167 states and 21740 transitions. Second operand has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:31:58,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:31:58,049 INFO L93 Difference]: Finished difference Result 8099 states and 24491 transitions. [2021-06-12 22:31:58,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-12 22:31:58,049 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-12 22:31:58,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:31:58,059 INFO L225 Difference]: With dead ends: 8099 [2021-06-12 22:31:58,060 INFO L226 Difference]: Without dead ends: 8059 [2021-06-12 22:31:58,060 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 896 ImplicationChecksByTransitivity, 2103.0ms TimeCoverageRelationStatistics Valid=270, Invalid=3512, Unknown=0, NotChecked=0, Total=3782 [2021-06-12 22:31:58,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8059 states. [2021-06-12 22:31:58,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8059 to 7185. [2021-06-12 22:31:58,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7185 states, 7184 states have (on average 3.032433184855234) internal successors, (21785), 7184 states have internal predecessors, (21785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:31:58,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7185 states to 7185 states and 21785 transitions. [2021-06-12 22:31:58,141 INFO L78 Accepts]: Start accepts. Automaton has 7185 states and 21785 transitions. Word has length 48 [2021-06-12 22:31:58,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:31:58,141 INFO L482 AbstractCegarLoop]: Abstraction has 7185 states and 21785 transitions. [2021-06-12 22:31:58,141 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:31:58,141 INFO L276 IsEmpty]: Start isEmpty. Operand 7185 states and 21785 transitions. [2021-06-12 22:31:58,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-12 22:31:58,149 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:31:58,149 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:31:58,350 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable263,261 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:31:58,350 INFO L430 AbstractCegarLoop]: === Iteration 265 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:31:58,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:31:58,350 INFO L82 PathProgramCache]: Analyzing trace with hash -468858650, now seen corresponding path program 175 times [2021-06-12 22:31:58,350 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:31:58,350 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85345036] [2021-06-12 22:31:58,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:31:58,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:31:58,757 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:31:58,757 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:31:58,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85345036] [2021-06-12 22:31:58,757 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85345036] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:31:58,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [624464549] [2021-06-12 22:31:58,757 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:31:58,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:31:58,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-12 22:31:58,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:31:58,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:31:58,955 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:31:58,967 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:31:58,967 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:31:58,967 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-12 22:31:59,134 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:31:59,135 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:31:59,147 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:31:59,148 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:31:59,148 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-06-12 22:31:59,610 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:31:59,610 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [624464549] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:31:59,611 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:31:59,611 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 40 [2021-06-12 22:31:59,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162479716] [2021-06-12 22:31:59,611 INFO L462 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-06-12 22:31:59,611 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:31:59,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-06-12 22:31:59,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1525, Unknown=0, NotChecked=0, Total=1640 [2021-06-12 22:31:59,611 INFO L87 Difference]: Start difference. First operand 7185 states and 21785 transitions. Second operand has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:32:01,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:32:01,485 INFO L93 Difference]: Finished difference Result 9319 states and 27993 transitions. [2021-06-12 22:32:01,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-12 22:32:01,486 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-12 22:32:01,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:32:01,496 INFO L225 Difference]: With dead ends: 9319 [2021-06-12 22:32:01,496 INFO L226 Difference]: Without dead ends: 9274 [2021-06-12 22:32:01,496 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 857 ImplicationChecksByTransitivity, 1873.0ms TimeCoverageRelationStatistics Valid=235, Invalid=3305, Unknown=0, NotChecked=0, Total=3540 [2021-06-12 22:32:01,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9274 states. [2021-06-12 22:32:01,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9274 to 7179. [2021-06-12 22:32:01,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7179 states, 7178 states have (on average 3.032320980774589) internal successors, (21766), 7178 states have internal predecessors, (21766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:32:01,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7179 states to 7179 states and 21766 transitions. [2021-06-12 22:32:01,593 INFO L78 Accepts]: Start accepts. Automaton has 7179 states and 21766 transitions. Word has length 48 [2021-06-12 22:32:01,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:32:01,593 INFO L482 AbstractCegarLoop]: Abstraction has 7179 states and 21766 transitions. [2021-06-12 22:32:01,593 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:32:01,593 INFO L276 IsEmpty]: Start isEmpty. Operand 7179 states and 21766 transitions. [2021-06-12 22:32:01,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-12 22:32:01,600 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:32:01,600 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:32:01,800 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable264,262 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:32:01,801 INFO L430 AbstractCegarLoop]: === Iteration 266 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:32:01,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:32:01,801 INFO L82 PathProgramCache]: Analyzing trace with hash -1415590450, now seen corresponding path program 176 times [2021-06-12 22:32:01,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:32:01,801 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420538565] [2021-06-12 22:32:01,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:32:01,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:32:02,208 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:32:02,208 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:32:02,208 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420538565] [2021-06-12 22:32:02,208 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420538565] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:32:02,208 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [646256980] [2021-06-12 22:32:02,208 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:32:02,239 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:32:02,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:32:02,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-12 22:32:02,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:32:02,368 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:32:02,369 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:32:02,381 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:32:02,382 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:32:02,382 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-12 22:32:02,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:32:02,544 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:32:02,555 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:32:02,556 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:32:02,556 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-06-12 22:32:03,017 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:32:03,017 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [646256980] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:32:03,017 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:32:03,017 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 40 [2021-06-12 22:32:03,017 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480995771] [2021-06-12 22:32:03,017 INFO L462 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-06-12 22:32:03,017 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:32:03,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-06-12 22:32:03,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1525, Unknown=0, NotChecked=0, Total=1640 [2021-06-12 22:32:03,018 INFO L87 Difference]: Start difference. First operand 7179 states and 21766 transitions. Second operand has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:32:04,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:32:04,675 INFO L93 Difference]: Finished difference Result 9327 states and 28010 transitions. [2021-06-12 22:32:04,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-12 22:32:04,675 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-12 22:32:04,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:32:04,687 INFO L225 Difference]: With dead ends: 9327 [2021-06-12 22:32:04,687 INFO L226 Difference]: Without dead ends: 9268 [2021-06-12 22:32:04,687 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 856 ImplicationChecksByTransitivity, 1837.1ms TimeCoverageRelationStatistics Valid=235, Invalid=3305, Unknown=0, NotChecked=0, Total=3540 [2021-06-12 22:32:04,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9268 states. [2021-06-12 22:32:04,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9268 to 7173. [2021-06-12 22:32:04,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7173 states, 7172 states have (on average 3.032626882320134) internal successors, (21750), 7172 states have internal predecessors, (21750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:32:04,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7173 states to 7173 states and 21750 transitions. [2021-06-12 22:32:04,785 INFO L78 Accepts]: Start accepts. Automaton has 7173 states and 21750 transitions. Word has length 48 [2021-06-12 22:32:04,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:32:04,785 INFO L482 AbstractCegarLoop]: Abstraction has 7173 states and 21750 transitions. [2021-06-12 22:32:04,786 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:32:04,786 INFO L276 IsEmpty]: Start isEmpty. Operand 7173 states and 21750 transitions. [2021-06-12 22:32:04,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-12 22:32:04,792 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:32:04,792 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:32:04,993 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 263 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable265 [2021-06-12 22:32:04,993 INFO L430 AbstractCegarLoop]: === Iteration 267 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:32:04,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:32:04,993 INFO L82 PathProgramCache]: Analyzing trace with hash -1570027968, now seen corresponding path program 177 times [2021-06-12 22:32:04,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:32:04,993 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270746302] [2021-06-12 22:32:04,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:32:04,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:32:05,401 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:32:05,401 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:32:05,401 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270746302] [2021-06-12 22:32:05,401 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270746302] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:32:05,401 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [940727822] [2021-06-12 22:32:05,401 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:32:05,432 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 22:32:05,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:32:05,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-12 22:32:05,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:32:05,567 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:32:05,568 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:32:05,580 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:32:05,581 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:32:05,581 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-12 22:32:05,738 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-12 22:32:05,739 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:32:05,750 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:32:05,750 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:32:05,750 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:32 [2021-06-12 22:32:06,237 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:32:06,238 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [940727822] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:32:06,238 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:32:06,238 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 40 [2021-06-12 22:32:06,238 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74342749] [2021-06-12 22:32:06,238 INFO L462 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-06-12 22:32:06,238 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:32:06,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-06-12 22:32:06,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1523, Unknown=0, NotChecked=0, Total=1640 [2021-06-12 22:32:06,238 INFO L87 Difference]: Start difference. First operand 7173 states and 21750 transitions. Second operand has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:32:07,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:32:07,928 INFO L93 Difference]: Finished difference Result 9334 states and 28025 transitions. [2021-06-12 22:32:07,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-12 22:32:07,929 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-12 22:32:07,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:32:07,941 INFO L225 Difference]: With dead ends: 9334 [2021-06-12 22:32:07,942 INFO L226 Difference]: Without dead ends: 9202 [2021-06-12 22:32:07,942 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 877 ImplicationChecksByTransitivity, 1823.3ms TimeCoverageRelationStatistics Valid=238, Invalid=3302, Unknown=0, NotChecked=0, Total=3540 [2021-06-12 22:32:07,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9202 states. [2021-06-12 22:32:08,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9202 to 7107. [2021-06-12 22:32:08,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7107 states, 7106 states have (on average 3.03771460737405) internal successors, (21586), 7106 states have internal predecessors, (21586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:32:08,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7107 states to 7107 states and 21586 transitions. [2021-06-12 22:32:08,054 INFO L78 Accepts]: Start accepts. Automaton has 7107 states and 21586 transitions. Word has length 48 [2021-06-12 22:32:08,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:32:08,054 INFO L482 AbstractCegarLoop]: Abstraction has 7107 states and 21586 transitions. [2021-06-12 22:32:08,054 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:32:08,054 INFO L276 IsEmpty]: Start isEmpty. Operand 7107 states and 21586 transitions. [2021-06-12 22:32:08,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-12 22:32:08,062 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:32:08,062 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:32:08,264 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 264 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable266 [2021-06-12 22:32:08,264 INFO L430 AbstractCegarLoop]: === Iteration 268 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:32:08,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:32:08,264 INFO L82 PathProgramCache]: Analyzing trace with hash -638630474, now seen corresponding path program 178 times [2021-06-12 22:32:08,264 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:32:08,264 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068361597] [2021-06-12 22:32:08,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:32:08,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:32:08,667 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:32:08,667 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:32:08,667 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068361597] [2021-06-12 22:32:08,667 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2068361597] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:32:08,667 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1025685098] [2021-06-12 22:32:08,667 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:32:08,697 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:32:08,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:32:08,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-12 22:32:08,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:32:08,859 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:32:08,860 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:32:08,872 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:32:08,873 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:32:08,873 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-12 22:32:09,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:32:09,029 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:32:09,040 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:32:09,041 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:32:09,041 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-06-12 22:32:09,462 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:32:09,462 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1025685098] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:32:09,462 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:32:09,462 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-12 22:32:09,462 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56931942] [2021-06-12 22:32:09,462 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-12 22:32:09,462 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:32:09,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-12 22:32:09,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1372, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 22:32:09,462 INFO L87 Difference]: Start difference. First operand 7107 states and 21586 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:32:11,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:32:11,244 INFO L93 Difference]: Finished difference Result 9320 states and 27985 transitions. [2021-06-12 22:32:11,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-12 22:32:11,244 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-12 22:32:11,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:32:11,254 INFO L225 Difference]: With dead ends: 9320 [2021-06-12 22:32:11,254 INFO L226 Difference]: Without dead ends: 9162 [2021-06-12 22:32:11,254 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 812 ImplicationChecksByTransitivity, 1777.3ms TimeCoverageRelationStatistics Valid=230, Invalid=3076, Unknown=0, NotChecked=0, Total=3306 [2021-06-12 22:32:11,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9162 states. [2021-06-12 22:32:11,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9162 to 7080. [2021-06-12 22:32:11,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7080 states, 7079 states have (on average 3.041531289730188) internal successors, (21531), 7079 states have internal predecessors, (21531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:32:11,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7080 states to 7080 states and 21531 transitions. [2021-06-12 22:32:11,347 INFO L78 Accepts]: Start accepts. Automaton has 7080 states and 21531 transitions. Word has length 48 [2021-06-12 22:32:11,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:32:11,347 INFO L482 AbstractCegarLoop]: Abstraction has 7080 states and 21531 transitions. [2021-06-12 22:32:11,347 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:32:11,347 INFO L276 IsEmpty]: Start isEmpty. Operand 7080 states and 21531 transitions. [2021-06-12 22:32:11,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-12 22:32:11,354 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:32:11,355 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:32:11,557 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 265 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable267 [2021-06-12 22:32:11,557 INFO L430 AbstractCegarLoop]: === Iteration 269 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:32:11,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:32:11,557 INFO L82 PathProgramCache]: Analyzing trace with hash -1313245780, now seen corresponding path program 179 times [2021-06-12 22:32:11,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:32:11,557 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092241545] [2021-06-12 22:32:11,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:32:11,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:32:11,964 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:32:11,964 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:32:11,964 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092241545] [2021-06-12 22:32:11,964 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1092241545] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:32:11,964 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [887414182] [2021-06-12 22:32:11,964 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:32:11,996 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 22:32:11,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:32:11,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-12 22:32:11,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:32:12,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:32:12,125 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:32:12,137 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:32:12,138 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:32:12,138 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-12 22:32:12,297 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:32:12,298 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:32:12,309 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:32:12,309 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:32:12,310 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-06-12 22:32:12,766 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:32:12,767 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [887414182] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:32:12,767 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:32:12,767 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 40 [2021-06-12 22:32:12,767 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660495647] [2021-06-12 22:32:12,767 INFO L462 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-06-12 22:32:12,767 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:32:12,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-06-12 22:32:12,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1525, Unknown=0, NotChecked=0, Total=1640 [2021-06-12 22:32:12,767 INFO L87 Difference]: Start difference. First operand 7080 states and 21531 transitions. Second operand has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:32:14,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:32:14,541 INFO L93 Difference]: Finished difference Result 9326 states and 28016 transitions. [2021-06-12 22:32:14,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-12 22:32:14,541 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-12 22:32:14,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:32:14,553 INFO L225 Difference]: With dead ends: 9326 [2021-06-12 22:32:14,553 INFO L226 Difference]: Without dead ends: 9208 [2021-06-12 22:32:14,553 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 893 ImplicationChecksByTransitivity, 1864.5ms TimeCoverageRelationStatistics Valid=240, Invalid=3420, Unknown=0, NotChecked=0, Total=3660 [2021-06-12 22:32:14,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9208 states. [2021-06-12 22:32:14,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9208 to 7104. [2021-06-12 22:32:14,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7104 states, 7103 states have (on average 3.0382936787272983) internal successors, (21581), 7103 states have internal predecessors, (21581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:32:14,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7104 states to 7104 states and 21581 transitions. [2021-06-12 22:32:14,650 INFO L78 Accepts]: Start accepts. Automaton has 7104 states and 21581 transitions. Word has length 48 [2021-06-12 22:32:14,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:32:14,650 INFO L482 AbstractCegarLoop]: Abstraction has 7104 states and 21581 transitions. [2021-06-12 22:32:14,650 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:32:14,650 INFO L276 IsEmpty]: Start isEmpty. Operand 7104 states and 21581 transitions. [2021-06-12 22:32:14,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-12 22:32:14,657 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:32:14,657 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:32:14,857 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 266 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable268 [2021-06-12 22:32:14,857 INFO L430 AbstractCegarLoop]: === Iteration 270 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:32:14,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:32:14,857 INFO L82 PathProgramCache]: Analyzing trace with hash -1205795412, now seen corresponding path program 180 times [2021-06-12 22:32:14,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:32:14,858 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355144453] [2021-06-12 22:32:14,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:32:14,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:32:15,268 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:32:15,268 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:32:15,268 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355144453] [2021-06-12 22:32:15,268 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1355144453] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:32:15,268 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1858782535] [2021-06-12 22:32:15,269 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:32:15,299 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 22:32:15,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:32:15,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-12 22:32:15,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:32:15,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:32:15,430 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:32:15,442 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:32:15,442 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:32:15,442 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-12 22:32:15,603 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:32:15,604 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:32:15,615 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:32:15,616 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:32:15,616 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-06-12 22:32:16,121 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:32:16,121 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1858782535] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:32:16,121 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:32:16,121 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 40 [2021-06-12 22:32:16,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307491752] [2021-06-12 22:32:16,122 INFO L462 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-06-12 22:32:16,122 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:32:16,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-06-12 22:32:16,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=1527, Unknown=0, NotChecked=0, Total=1640 [2021-06-12 22:32:16,122 INFO L87 Difference]: Start difference. First operand 7104 states and 21581 transitions. Second operand has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:32:17,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:32:17,929 INFO L93 Difference]: Finished difference Result 8026 states and 24309 transitions. [2021-06-12 22:32:17,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-12 22:32:17,930 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-12 22:32:17,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:32:17,940 INFO L225 Difference]: With dead ends: 8026 [2021-06-12 22:32:17,940 INFO L226 Difference]: Without dead ends: 7986 [2021-06-12 22:32:17,940 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 896 ImplicationChecksByTransitivity, 2088.0ms TimeCoverageRelationStatistics Valid=270, Invalid=3512, Unknown=0, NotChecked=0, Total=3782 [2021-06-12 22:32:17,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7986 states. [2021-06-12 22:32:18,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7986 to 7116. [2021-06-12 22:32:18,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7116 states, 7115 states have (on average 3.037245256500351) internal successors, (21610), 7115 states have internal predecessors, (21610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:32:18,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7116 states to 7116 states and 21610 transitions. [2021-06-12 22:32:18,027 INFO L78 Accepts]: Start accepts. Automaton has 7116 states and 21610 transitions. Word has length 48 [2021-06-12 22:32:18,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:32:18,027 INFO L482 AbstractCegarLoop]: Abstraction has 7116 states and 21610 transitions. [2021-06-12 22:32:18,027 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:32:18,027 INFO L276 IsEmpty]: Start isEmpty. Operand 7116 states and 21610 transitions. [2021-06-12 22:32:18,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-12 22:32:18,034 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:32:18,034 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:32:18,235 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable269,267 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:32:18,235 INFO L430 AbstractCegarLoop]: === Iteration 271 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:32:18,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:32:18,235 INFO L82 PathProgramCache]: Analyzing trace with hash -2081977876, now seen corresponding path program 181 times [2021-06-12 22:32:18,235 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:32:18,235 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111296500] [2021-06-12 22:32:18,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:32:18,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:32:18,675 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:32:18,675 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:32:18,675 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111296500] [2021-06-12 22:32:18,675 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [111296500] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:32:18,675 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2075929973] [2021-06-12 22:32:18,675 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:32:18,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:32:18,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-12 22:32:18,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:32:18,833 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-12 22:32:18,834 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:32:18,846 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:32:18,847 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:32:18,847 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:31 [2021-06-12 22:32:19,008 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:32:19,008 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:32:19,019 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:32:19,020 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:32:19,020 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-06-12 22:32:19,480 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:32:19,480 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2075929973] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:32:19,480 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:32:19,480 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 40 [2021-06-12 22:32:19,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156204904] [2021-06-12 22:32:19,480 INFO L462 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-06-12 22:32:19,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:32:19,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-06-12 22:32:19,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1525, Unknown=0, NotChecked=0, Total=1640 [2021-06-12 22:32:19,481 INFO L87 Difference]: Start difference. First operand 7116 states and 21610 transitions. Second operand has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:32:21,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:32:21,257 INFO L93 Difference]: Finished difference Result 9255 states and 27830 transitions. [2021-06-12 22:32:21,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-12 22:32:21,257 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-12 22:32:21,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:32:21,268 INFO L225 Difference]: With dead ends: 9255 [2021-06-12 22:32:21,268 INFO L226 Difference]: Without dead ends: 9216 [2021-06-12 22:32:21,268 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 857 ImplicationChecksByTransitivity, 1876.5ms TimeCoverageRelationStatistics Valid=235, Invalid=3305, Unknown=0, NotChecked=0, Total=3540 [2021-06-12 22:32:21,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9216 states. [2021-06-12 22:32:21,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9216 to 7112. [2021-06-12 22:32:21,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7112 states, 7111 states have (on average 3.037406834481789) internal successors, (21599), 7111 states have internal predecessors, (21599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:32:21,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7112 states to 7112 states and 21599 transitions. [2021-06-12 22:32:21,367 INFO L78 Accepts]: Start accepts. Automaton has 7112 states and 21599 transitions. Word has length 48 [2021-06-12 22:32:21,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:32:21,367 INFO L482 AbstractCegarLoop]: Abstraction has 7112 states and 21599 transitions. [2021-06-12 22:32:21,367 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:32:21,367 INFO L276 IsEmpty]: Start isEmpty. Operand 7112 states and 21599 transitions. [2021-06-12 22:32:21,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-12 22:32:21,374 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:32:21,374 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:32:21,575 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 268 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable270 [2021-06-12 22:32:21,575 INFO L430 AbstractCegarLoop]: === Iteration 272 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:32:21,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:32:21,575 INFO L82 PathProgramCache]: Analyzing trace with hash -1940262736, now seen corresponding path program 182 times [2021-06-12 22:32:21,575 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:32:21,575 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121473774] [2021-06-12 22:32:21,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:32:21,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:32:21,983 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:32:21,984 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:32:21,984 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121473774] [2021-06-12 22:32:21,984 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [121473774] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:32:21,984 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972496465] [2021-06-12 22:32:21,984 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:32:22,015 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:32:22,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:32:22,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-12 22:32:22,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:32:22,144 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-12 22:32:22,145 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:32:22,157 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:32:22,157 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:32:22,157 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:31 [2021-06-12 22:32:22,319 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:32:22,320 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:32:22,331 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:32:22,331 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:32:22,331 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-06-12 22:32:22,790 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:32:22,790 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [972496465] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:32:22,791 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:32:22,791 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 40 [2021-06-12 22:32:22,791 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617902459] [2021-06-12 22:32:22,791 INFO L462 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-06-12 22:32:22,791 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:32:22,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-06-12 22:32:22,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1525, Unknown=0, NotChecked=0, Total=1640 [2021-06-12 22:32:22,791 INFO L87 Difference]: Start difference. First operand 7112 states and 21599 transitions. Second operand has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:32:24,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:32:24,743 INFO L93 Difference]: Finished difference Result 9269 states and 27863 transitions. [2021-06-12 22:32:24,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-12 22:32:24,744 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-12 22:32:24,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:32:24,756 INFO L225 Difference]: With dead ends: 9269 [2021-06-12 22:32:24,756 INFO L226 Difference]: Without dead ends: 9212 [2021-06-12 22:32:24,756 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 856 ImplicationChecksByTransitivity, 1817.4ms TimeCoverageRelationStatistics Valid=235, Invalid=3305, Unknown=0, NotChecked=0, Total=3540 [2021-06-12 22:32:24,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9212 states. [2021-06-12 22:32:24,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9212 to 7108. [2021-06-12 22:32:24,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7108 states, 7107 states have (on average 3.037568594343605) internal successors, (21588), 7107 states have internal predecessors, (21588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:32:24,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7108 states to 7108 states and 21588 transitions. [2021-06-12 22:32:24,856 INFO L78 Accepts]: Start accepts. Automaton has 7108 states and 21588 transitions. Word has length 48 [2021-06-12 22:32:24,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:32:24,856 INFO L482 AbstractCegarLoop]: Abstraction has 7108 states and 21588 transitions. [2021-06-12 22:32:24,856 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:32:24,856 INFO L276 IsEmpty]: Start isEmpty. Operand 7108 states and 21588 transitions. [2021-06-12 22:32:24,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-12 22:32:24,863 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:32:24,863 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:32:25,064 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 269 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable271 [2021-06-12 22:32:25,064 INFO L430 AbstractCegarLoop]: === Iteration 273 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:32:25,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:32:25,064 INFO L82 PathProgramCache]: Analyzing trace with hash 1071557100, now seen corresponding path program 183 times [2021-06-12 22:32:25,064 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:32:25,064 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062962832] [2021-06-12 22:32:25,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:32:25,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:32:25,476 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:32:25,476 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:32:25,476 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062962832] [2021-06-12 22:32:25,477 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062962832] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:32:25,477 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [399895684] [2021-06-12 22:32:25,477 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:32:25,507 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 22:32:25,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:32:25,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-12 22:32:25,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:32:25,636 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:32:25,636 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:32:25,648 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:32:25,649 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:32:25,649 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-12 22:32:25,820 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-12 22:32:25,821 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:32:25,876 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:32:25,877 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:32:25,877 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:32 [2021-06-12 22:32:26,343 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:32:26,343 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [399895684] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:32:26,343 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:32:26,343 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 40 [2021-06-12 22:32:26,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403928122] [2021-06-12 22:32:26,343 INFO L462 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-06-12 22:32:26,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:32:26,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-06-12 22:32:26,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1525, Unknown=0, NotChecked=0, Total=1640 [2021-06-12 22:32:26,344 INFO L87 Difference]: Start difference. First operand 7108 states and 21588 transitions. Second operand has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:32:27,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:32:27,915 INFO L93 Difference]: Finished difference Result 9282 states and 27895 transitions. [2021-06-12 22:32:27,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-12 22:32:27,916 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-12 22:32:27,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:32:27,929 INFO L225 Difference]: With dead ends: 9282 [2021-06-12 22:32:27,929 INFO L226 Difference]: Without dead ends: 9196 [2021-06-12 22:32:27,929 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 856 ImplicationChecksByTransitivity, 1856.2ms TimeCoverageRelationStatistics Valid=235, Invalid=3305, Unknown=0, NotChecked=0, Total=3540 [2021-06-12 22:32:27,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9196 states. [2021-06-12 22:32:28,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9196 to 7088. [2021-06-12 22:32:28,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7088 states, 7087 states have (on average 3.040637787498236) internal successors, (21549), 7087 states have internal predecessors, (21549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:32:28,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7088 states to 7088 states and 21549 transitions. [2021-06-12 22:32:28,036 INFO L78 Accepts]: Start accepts. Automaton has 7088 states and 21549 transitions. Word has length 48 [2021-06-12 22:32:28,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:32:28,036 INFO L482 AbstractCegarLoop]: Abstraction has 7088 states and 21549 transitions. [2021-06-12 22:32:28,036 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:32:28,036 INFO L276 IsEmpty]: Start isEmpty. Operand 7088 states and 21549 transitions. [2021-06-12 22:32:28,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-12 22:32:28,046 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:32:28,046 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:32:28,268 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable272,270 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:32:28,269 INFO L430 AbstractCegarLoop]: === Iteration 274 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:32:28,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:32:28,269 INFO L82 PathProgramCache]: Analyzing trace with hash 329434740, now seen corresponding path program 184 times [2021-06-12 22:32:28,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:32:28,269 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949125051] [2021-06-12 22:32:28,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:32:28,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:32:28,762 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:32:28,763 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:32:28,763 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949125051] [2021-06-12 22:32:28,763 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949125051] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:32:28,763 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [146143689] [2021-06-12 22:32:28,763 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:32:28,794 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:32:28,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:32:28,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-12 22:32:28,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:32:28,923 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-12 22:32:28,924 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:32:28,936 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:32:28,937 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:32:28,937 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:31 [2021-06-12 22:32:29,098 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:32:29,099 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:32:29,110 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:32:29,111 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:32:29,111 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-06-12 22:32:29,573 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:32:29,573 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [146143689] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:32:29,573 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:32:29,573 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 40 [2021-06-12 22:32:29,573 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942793001] [2021-06-12 22:32:29,573 INFO L462 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-06-12 22:32:29,573 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:32:29,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-06-12 22:32:29,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1525, Unknown=0, NotChecked=0, Total=1640 [2021-06-12 22:32:29,574 INFO L87 Difference]: Start difference. First operand 7088 states and 21549 transitions. Second operand has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:32:31,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:32:31,109 INFO L93 Difference]: Finished difference Result 9310 states and 27968 transitions. [2021-06-12 22:32:31,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-12 22:32:31,110 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-12 22:32:31,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:32:31,121 INFO L225 Difference]: With dead ends: 9310 [2021-06-12 22:32:31,121 INFO L226 Difference]: Without dead ends: 9175 [2021-06-12 22:32:31,122 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 893 ImplicationChecksByTransitivity, 1958.8ms TimeCoverageRelationStatistics Valid=240, Invalid=3420, Unknown=0, NotChecked=0, Total=3660 [2021-06-12 22:32:31,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9175 states. [2021-06-12 22:32:31,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9175 to 7084. [2021-06-12 22:32:31,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7084 states, 7083 states have (on average 3.0408019200903573) internal successors, (21538), 7083 states have internal predecessors, (21538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:32:31,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7084 states to 7084 states and 21538 transitions. [2021-06-12 22:32:31,224 INFO L78 Accepts]: Start accepts. Automaton has 7084 states and 21538 transitions. Word has length 48 [2021-06-12 22:32:31,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:32:31,224 INFO L482 AbstractCegarLoop]: Abstraction has 7084 states and 21538 transitions. [2021-06-12 22:32:31,224 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:32:31,224 INFO L276 IsEmpty]: Start isEmpty. Operand 7084 states and 21538 transitions. [2021-06-12 22:32:31,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-12 22:32:31,231 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:32:31,231 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:32:31,431 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable273,271 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:32:31,432 INFO L430 AbstractCegarLoop]: === Iteration 275 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:32:31,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:32:31,432 INFO L82 PathProgramCache]: Analyzing trace with hash -1430110822, now seen corresponding path program 185 times [2021-06-12 22:32:31,432 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:32:31,432 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222538160] [2021-06-12 22:32:31,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:32:31,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Received shutdown request... [2021-06-12 22:32:31,457 WARN L222 SmtUtils]: Removed 8 from assertion stack [2021-06-12 22:32:31,458 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable274 [2021-06-12 22:32:31,458 WARN L547 AbstractCegarLoop]: Verification canceled [2021-06-12 22:32:31,459 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-12 22:32:31,460 WARN L196 ceAbstractionStarter]: Timeout [2021-06-12 22:32:31,461 INFO L202 PluginConnector]: Adding new model queue-add-3-nl.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.06 10:32:31 BasicIcfg [2021-06-12 22:32:31,461 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-12 22:32:31,461 INFO L168 Benchmark]: Toolchain (without parser) took 762517.59 ms. Allocated memory was 186.6 MB in the beginning and 1.1 GB in the end (delta: 897.6 MB). Free memory was 167.1 MB in the beginning and 776.0 MB in the end (delta: -608.9 MB). Peak memory consumption was 289.3 MB. Max. memory is 8.0 GB. [2021-06-12 22:32:31,461 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.11 ms. Allocated memory is still 186.6 MB. Free memory is still 168.3 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-06-12 22:32:31,461 INFO L168 Benchmark]: Boogie Procedure Inliner took 21.96 ms. Allocated memory is still 186.6 MB. Free memory was 167.0 MB in the beginning and 165.5 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-06-12 22:32:31,461 INFO L168 Benchmark]: Boogie Preprocessor took 13.93 ms. Allocated memory is still 186.6 MB. Free memory was 165.5 MB in the beginning and 164.5 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-06-12 22:32:31,461 INFO L168 Benchmark]: RCFGBuilder took 257.01 ms. Allocated memory is still 186.6 MB. Free memory was 164.4 MB in the beginning and 147.6 MB in the end (delta: 16.8 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. [2021-06-12 22:32:31,461 INFO L168 Benchmark]: TraceAbstraction took 762220.42 ms. Allocated memory was 186.6 MB in the beginning and 1.1 GB in the end (delta: 897.6 MB). Free memory was 147.2 MB in the beginning and 776.0 MB in the end (delta: -628.8 MB). Peak memory consumption was 269.4 MB. Max. memory is 8.0 GB. [2021-06-12 22:32:31,461 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.11 ms. Allocated memory is still 186.6 MB. Free memory is still 168.3 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 21.96 ms. Allocated memory is still 186.6 MB. Free memory was 167.0 MB in the beginning and 165.5 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 13.93 ms. Allocated memory is still 186.6 MB. Free memory was 165.5 MB in the beginning and 164.5 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 257.01 ms. Allocated memory is still 186.6 MB. Free memory was 164.4 MB in the beginning and 147.6 MB in the end (delta: 16.8 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. * TraceAbstraction took 762220.42 ms. Allocated memory was 186.6 MB in the beginning and 1.1 GB in the end (delta: 897.6 MB). Free memory was 147.2 MB in the beginning and 776.0 MB in the end (delta: -628.8 MB). Peak memory consumption was 269.4 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 96]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was analyzing trace of length 49 with TraceHistMax 2,while InterpolatingTraceCheckCraig was constructing Craig interpolants,while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 18 for 3ms.. - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 7 procedures, 71 locations, 4 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 762146.0ms, OverallIterations: 275, TraceHistogramMax: 2, EmptinessCheckTime: 1568.2ms, AutomataDifference: 422903.7ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 162.8ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 39242 SDtfs, 62034 SDslu, 616384 SDs, 0 SdLazy, 438492 SolverSat, 9502 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 162639.9ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 21327 GetRequests, 7373 SyntacticMatches, 630 SemanticMatches, 13324 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184628 ImplicationChecksByTransitivity, 421517.9ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=7314occurred in iteration=181, InterpolantAutomatonStates: 8447, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 20387.3ms AutomataMinimizationTime, 274 MinimizatonAttempts, 390426 StatesRemovedByMinimization, 270 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1518.9ms SsaConstructionTime, 3710.1ms SatisfiabilityAnalysisTime, 250865.9ms InterpolantComputationTime, 23441 NumberOfCodeBlocks, 23441 NumberOfCodeBlocksAsserted, 836 NumberOfCheckSat, 22897 ConstructedInterpolants, 0 QuantifiedInterpolants, 555513 SizeOfPredicates, 3193 NumberOfNonLiveVariables, 29379 ConjunctsInSsa, 10102 ConjunctsInUnsatCore, 544 InterpolantComputations, 5 PerfectInterpolantSequences, 73/6224 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown